1 15325 Pre-work assignment Preparing your conflict scenario (four copies of your scenario must be brought to the workshop) Dear Participant, This letter introduces some pre-course work that is essential for you to complete before arriving at the workshop for the subject Negotiations and Conflict Management: 15325 – in which you are enrolled. The workshop will combine theory and practice in a manner intended to use the wisdom in the room to bring together our thinking about enacting the practices you will learn about. You will bring with you a scenario to work through during the workshop. This letter explains how to write that. 1 The situation (you can give it a title if that helps to frame it for you) Your first task is to identify a situation that is (or in your opinion is) unresolved and has potential to escalate into a matter causing stress, tension, delay or confusion. This may be something at work or in a context where you have the power to take action. You will use fictional names and disguise other facts to ensure confidentiality, but it is essential that this is a real situation – not a hypothetical or fictional one. 2 The Details To enable others to understand the context you will need to describe the following – A The people. Describe each person using the following items – Name – Use a fictional name for each person and do not include more than four others apart from yourself. You can use your own name if you wish or also disguise that as well. General facts about each person – gender, age range, role title, marital status (if relevant) work/life location (if other than yours) Personal characteristics – select at least 5 key words/phrases chosen from the list at the end of this letter Relationship to others in the scenario – boss, subordinate, peer, family member, relative etc. B The context. Type of business or other relevant information to provide a general setting for the moment you will use to describe the unresolved issue. C The event (moment in time). This can be at least partly imagined in that you will need to summarise a lot of information and it might be easier to do so if you write it as conversation even if that has not happened. 2 A sample example written in this way follows. This is a real scenario written by a person who will not be attending the workshop. It took 40 minutes to write. That involved 10 minutes to collect thoughts, select words and frame the setting and then 30 minutes to put it into the words you are reading. The advice is to allow yourself at least this amount of time and also to find a quiet space and time to write your scenario. Example Case Study Title – Where is that space? Setting – a Sydney residential street, in a smallish inner city suburb. There is a main road at one end of the street and a large schoolyard at the other end. At the corner of the street and the main road is a temporary church site whose owners are seeking to extend and develop the site. On the opposite corner is a second hand car yard with the imaginative title of “Junk your Jalopy” (JyJ). Aside from a block of six flats next to the home Eva has lived in for 12 years, all the other residences are single storey homes most built in the first two decades of the 20th century. Most residents have at least one car – often two. Umberto works at JyJ and may be a part owner. He doesn’t live nearby. On a recent occasion Eva, who is reasonably laid back but can be forgetful, was moved to anger by the presence, in the street outside her front door, of a very old and battered panel van that she knew did not belong to any of the residents. It has been there for nearly two weeks and meant that she was parking her car out of sight in a side lane, on land owned by the church. This is not official parking for the street and is often blocked off by the church. Walking to the corner one morning she saw Umberto taking photos of a motorbike and went to raise the issue of the van with him. He is not particularly interested in others’ concerns about the lack of parking and merely wants to make a success of the business. If that means parking extra cars in the street and annoying a few residents he’s opportunistic enough to do so without compunction. Although she is usually fearful of conflict Eva was determined to do something to try and put a stop to JYJ’s habit of parking cars illegally in the residential area. She opened the conversation by asking if Umberto knew anything about the van. He denied all knowledge of it and became quite aggressive (or at least it seemed that way to Eva) about the matter of cars in the street, denying that any were from JyJ, suggesting she talk to the owners of the spare parts yard facing the main road. As Eva tried to ask him to consider the needs and rights of residents, Umberto became ever more inflexible disregarding her issue and suggesting she leave his premises. Although she is quite creative, and has worked for 30 years in a variety of roles Eva is not always able to speak her mind easily, and his denials were not helping. He even began whinging about having to ‘cop the s—t’ for the spare parts yard but resisted the idea of marking his cars so residents could see those parked illegally were not his. 3 As she walked away Eva heard herself say “well if you do nothing about it, then you’ll have to continue copping the s—t, and I hope it hurts”, realising as she did so that she would not be any better off for her efforts. When she got home that night the van was gone – but a different one had arrived within four days. The issue is unresolved. Words to describe the people in your scenario accurate inquisitive empire building adaptable knowledgeable erratic analytical logical fearful of conflict broad in outlook loyal forgetful calm & confident observant frightened of failure caring opportunistic fussy challenging original impatient clever outgoing impulsive competitive outspoken indecisive conscientious perfectionist inflexible conscious of priorities persistent insular consultative persuasive laid back 4 co-operative practical manipulative creative professionally dedicated not interested in others diplomatic Marking Criteria for the Case Study How to get the maximum marks for the case study! For 10 marks – the case study – Accurately uses more than the required number of suggested words to describe the people in the scenario. That is the words used to describe the people are descriptive and placed appropriately to ensure a reader is able to create an informative word picture of each person. The sequence of events is presented in a manner that ensures the current situation, and possible consequences of any future actions, are easily understood by a reader not familiar with the context. Includes enough information to ensure that a stranger does not need to ask additional questions to affirm understanding of the situation as described in the case study. For 8 – 9 marks – the case study – Uses the set minimum number of words. The words are used correctly. The sequence is reasonably ordered, but readers find they need to ask one or two questions about the actual context, order of events. There is less that a sufficient amount of information to ensure that a stranger will quickly understand the nature of issues that remain unresolved. For 5 – 7 – the case study – Uses the set minimum number of words. Not all words are used appropriately in the context, but a stranger is able to gain an impression of the people. The sequence of events – as presented in the case study text – needs some re-ordering in response to questions from other readers to enable them to understand the issues. Strangers will need to seek additional information before they feel able to understand the issue and/or the context. For F = less than 5 – the case study – Uses fewer than the set minimum number of words. They do not add to the information about the people. 5 The sequence of events is unclear and does not represent the issue/s in a manner that can be understood by a stranger. A good deal of additional information is required before a stranger can understand the nature of the issues and context.

1 15325 Pre-work assignment Preparing your conflict scenario (four copies of your scenario must be brought to the workshop) Dear Participant, This letter introduces some pre-course work that is essential for you to complete before arriving at the workshop for the subject Negotiations and Conflict Management: 15325 – in which you are enrolled. The workshop will combine theory and practice in a manner intended to use the wisdom in the room to bring together our thinking about enacting the practices you will learn about. You will bring with you a scenario to work through during the workshop. This letter explains how to write that. 1 The situation (you can give it a title if that helps to frame it for you) Your first task is to identify a situation that is (or in your opinion is) unresolved and has potential to escalate into a matter causing stress, tension, delay or confusion. This may be something at work or in a context where you have the power to take action. You will use fictional names and disguise other facts to ensure confidentiality, but it is essential that this is a real situation – not a hypothetical or fictional one. 2 The Details To enable others to understand the context you will need to describe the following – A The people. Describe each person using the following items – Name – Use a fictional name for each person and do not include more than four others apart from yourself. You can use your own name if you wish or also disguise that as well. General facts about each person – gender, age range, role title, marital status (if relevant) work/life location (if other than yours) Personal characteristics – select at least 5 key words/phrases chosen from the list at the end of this letter Relationship to others in the scenario – boss, subordinate, peer, family member, relative etc. B The context. Type of business or other relevant information to provide a general setting for the moment you will use to describe the unresolved issue. C The event (moment in time). This can be at least partly imagined in that you will need to summarise a lot of information and it might be easier to do so if you write it as conversation even if that has not happened. 2 A sample example written in this way follows. This is a real scenario written by a person who will not be attending the workshop. It took 40 minutes to write. That involved 10 minutes to collect thoughts, select words and frame the setting and then 30 minutes to put it into the words you are reading. The advice is to allow yourself at least this amount of time and also to find a quiet space and time to write your scenario. Example Case Study Title – Where is that space? Setting – a Sydney residential street, in a smallish inner city suburb. There is a main road at one end of the street and a large schoolyard at the other end. At the corner of the street and the main road is a temporary church site whose owners are seeking to extend and develop the site. On the opposite corner is a second hand car yard with the imaginative title of “Junk your Jalopy” (JyJ). Aside from a block of six flats next to the home Eva has lived in for 12 years, all the other residences are single storey homes most built in the first two decades of the 20th century. Most residents have at least one car – often two. Umberto works at JyJ and may be a part owner. He doesn’t live nearby. On a recent occasion Eva, who is reasonably laid back but can be forgetful, was moved to anger by the presence, in the street outside her front door, of a very old and battered panel van that she knew did not belong to any of the residents. It has been there for nearly two weeks and meant that she was parking her car out of sight in a side lane, on land owned by the church. This is not official parking for the street and is often blocked off by the church. Walking to the corner one morning she saw Umberto taking photos of a motorbike and went to raise the issue of the van with him. He is not particularly interested in others’ concerns about the lack of parking and merely wants to make a success of the business. If that means parking extra cars in the street and annoying a few residents he’s opportunistic enough to do so without compunction. Although she is usually fearful of conflict Eva was determined to do something to try and put a stop to JYJ’s habit of parking cars illegally in the residential area. She opened the conversation by asking if Umberto knew anything about the van. He denied all knowledge of it and became quite aggressive (or at least it seemed that way to Eva) about the matter of cars in the street, denying that any were from JyJ, suggesting she talk to the owners of the spare parts yard facing the main road. As Eva tried to ask him to consider the needs and rights of residents, Umberto became ever more inflexible disregarding her issue and suggesting she leave his premises. Although she is quite creative, and has worked for 30 years in a variety of roles Eva is not always able to speak her mind easily, and his denials were not helping. He even began whinging about having to ‘cop the s—t’ for the spare parts yard but resisted the idea of marking his cars so residents could see those parked illegally were not his. 3 As she walked away Eva heard herself say “well if you do nothing about it, then you’ll have to continue copping the s—t, and I hope it hurts”, realising as she did so that she would not be any better off for her efforts. When she got home that night the van was gone – but a different one had arrived within four days. The issue is unresolved. Words to describe the people in your scenario accurate inquisitive empire building adaptable knowledgeable erratic analytical logical fearful of conflict broad in outlook loyal forgetful calm & confident observant frightened of failure caring opportunistic fussy challenging original impatient clever outgoing impulsive competitive outspoken indecisive conscientious perfectionist inflexible conscious of priorities persistent insular consultative persuasive laid back 4 co-operative practical manipulative creative professionally dedicated not interested in others diplomatic Marking Criteria for the Case Study How to get the maximum marks for the case study! For 10 marks – the case study – Accurately uses more than the required number of suggested words to describe the people in the scenario. That is the words used to describe the people are descriptive and placed appropriately to ensure a reader is able to create an informative word picture of each person. The sequence of events is presented in a manner that ensures the current situation, and possible consequences of any future actions, are easily understood by a reader not familiar with the context. Includes enough information to ensure that a stranger does not need to ask additional questions to affirm understanding of the situation as described in the case study. For 8 – 9 marks – the case study – Uses the set minimum number of words. The words are used correctly. The sequence is reasonably ordered, but readers find they need to ask one or two questions about the actual context, order of events. There is less that a sufficient amount of information to ensure that a stranger will quickly understand the nature of issues that remain unresolved. For 5 – 7 – the case study – Uses the set minimum number of words. Not all words are used appropriately in the context, but a stranger is able to gain an impression of the people. The sequence of events – as presented in the case study text – needs some re-ordering in response to questions from other readers to enable them to understand the issues. Strangers will need to seek additional information before they feel able to understand the issue and/or the context. For F = less than 5 – the case study – Uses fewer than the set minimum number of words. They do not add to the information about the people. 5 The sequence of events is unclear and does not represent the issue/s in a manner that can be understood by a stranger. A good deal of additional information is required before a stranger can understand the nature of the issues and context.

(Conflict scenario) Title – Who steal the gold?   Setting: … Read More...
Chapter 13 Practice Problems (Practice – no credit) Due: 11:59pm on Friday, May 16, 2014 You will receive no credit for items you complete after the assignment is due. Grading Policy A Matter of Some Gravity Learning Goal: To understand Newton’s law of gravitation and the distinction between inertial and gravitational masses. In this problem, you will practice using Newton’s law of gravitation. According to that law, the magnitude of the gravitational force between two small particles of masses and , separated by a distance , is given by , where is the universal gravitational constant, whose numerical value (in SI units) is . This formula applies not only to small particles, but also to spherical objects. In fact, the gravitational force between two uniform spheres is the same as if we concentrated all the mass of each sphere at its center. Thus, by modeling the Earth and the Moon as uniform spheres, you can use the particle approximation when calculating the force of gravity between them. Be careful in using Newton’s law to choose the correct value for . To calculate the force of gravitational attraction between two uniform spheres, the distance in the equation for Newton’s law of gravitation is the distance between the centers of the spheres. For instance, if a small object such as an elephant is located on the surface of the Earth, the radius of the Earth would be used in the equation. Note that the force of gravity acting on an object located near the surface of a planet is often called weight. Also note that in situations involving satellites, you are often given the altitude of the satellite, that is, the distance from the satellite to the surface of the planet; this is not the distance to be used in the formula for the law of gravitation. There is a potentially confusing issue involving mass. Mass is defined as a measure of an object’s inertia, that is, its ability to resist acceleration. Newton’s second law demonstrates the relationship between mass, acceleration, and the net force acting on an object: . We can now refer to this measure of inertia more precisely as the inertial mass. On the other hand, the masses of the particles that appear in the expression for the law of gravity seem to have nothing to do with inertia: Rather, they serve as a measure of the strength of gravitational interactions. It would be reasonable to call such a property gravitational mass. Does this mean that every object has two different masses? Generally speaking, yes. However, the good news is that according to the latest, highly precise, measurements, the inertial and the gravitational mass of an object are, in fact, equal to each other; it is an established consensus among physicists that there is only one mass after all, which is a measure of both the object’s inertia and its ability to engage in gravitational interactions. Note that this consensus, like everything else in science, is open to possible amendments in the future. In this problem, you will answer several questions that require the use of Newton’s law of gravitation. Part A Two particles are separated by a certain distance. The force of gravitational interaction between them is . Now the separation between the particles is tripled. Find the new force of gravitational Fg m1 m2 r Fg = G m1m2 r2 G 6.67 × 10−11 N m2 kg2 r r rEarth F  = m net a F0

Chapter 13 Practice Problems (Practice – no credit) Due: 11:59pm on Friday, May 16, 2014 You will receive no credit for items you complete after the assignment is due. Grading Policy A Matter of Some Gravity Learning Goal: To understand Newton’s law of gravitation and the distinction between inertial and gravitational masses. In this problem, you will practice using Newton’s law of gravitation. According to that law, the magnitude of the gravitational force between two small particles of masses and , separated by a distance , is given by , where is the universal gravitational constant, whose numerical value (in SI units) is . This formula applies not only to small particles, but also to spherical objects. In fact, the gravitational force between two uniform spheres is the same as if we concentrated all the mass of each sphere at its center. Thus, by modeling the Earth and the Moon as uniform spheres, you can use the particle approximation when calculating the force of gravity between them. Be careful in using Newton’s law to choose the correct value for . To calculate the force of gravitational attraction between two uniform spheres, the distance in the equation for Newton’s law of gravitation is the distance between the centers of the spheres. For instance, if a small object such as an elephant is located on the surface of the Earth, the radius of the Earth would be used in the equation. Note that the force of gravity acting on an object located near the surface of a planet is often called weight. Also note that in situations involving satellites, you are often given the altitude of the satellite, that is, the distance from the satellite to the surface of the planet; this is not the distance to be used in the formula for the law of gravitation. There is a potentially confusing issue involving mass. Mass is defined as a measure of an object’s inertia, that is, its ability to resist acceleration. Newton’s second law demonstrates the relationship between mass, acceleration, and the net force acting on an object: . We can now refer to this measure of inertia more precisely as the inertial mass. On the other hand, the masses of the particles that appear in the expression for the law of gravity seem to have nothing to do with inertia: Rather, they serve as a measure of the strength of gravitational interactions. It would be reasonable to call such a property gravitational mass. Does this mean that every object has two different masses? Generally speaking, yes. However, the good news is that according to the latest, highly precise, measurements, the inertial and the gravitational mass of an object are, in fact, equal to each other; it is an established consensus among physicists that there is only one mass after all, which is a measure of both the object’s inertia and its ability to engage in gravitational interactions. Note that this consensus, like everything else in science, is open to possible amendments in the future. In this problem, you will answer several questions that require the use of Newton’s law of gravitation. Part A Two particles are separated by a certain distance. The force of gravitational interaction between them is . Now the separation between the particles is tripled. Find the new force of gravitational Fg m1 m2 r Fg = G m1m2 r2 G 6.67 × 10−11 N m2 kg2 r r rEarth F  = m net a F0

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Please answer questions and then submit them in the assignment. Put your name in the document’s title. Eight points for questions 1-10, ten points each for questions 11 and 12. 1. What were the crusades, how did they begin, and how were they justified? 2. Describe the 1348 plague in Europe and how it changed human behavior. 3. What other calamities besides the plague occurred during the 14th century? What were the results? 4. What inventions during the middle ages and the Renaissance had the biggest impact on human culture in Western Europe? 5. What was a pilgrimage? Why did people go on them? 6. Describe what is happening in this image? Who is the central figure? Where might this image be located? How does it exemplify the era in which it was made? 7. Why was Socrates condemned to death? How did he handle his death sentence? What was the impact of his death for Athenians and the Western Heritage? 8. Name three Western legacies from ancient Egypt. How did the ancient Egyptians have a lasting impact on Western civilization? 9. How did Themistocles and the Greeks keep the Persians under Xerxes from invading? How did the trireme help? 10. Compare these two buildings. Identify them and say how they are alike and different and why we might want to know what they are. Where are they located? When were they constructed? What purposes did they serve? (5 points) 11. Compare ancient Rome and the contemporary United States. In what ways are the two superpowers similar? What are the similarities between their military strength, their colonization, the division of wealth, and their ways of appeasing the masses? In what ways did the Romans assume that assimilation to the Roman way would work for everyone they colonized? Has the U.S. done the same thing? In what ways is the Roman history different from the U.S. history of revolution against the British? Is the United States doomed to fail in the way ancient Rome did? 12. Compare the work of art you viewed in a museum with a work of text that we read in class or a work if art or architecture in the textbook. In what ways do they inform one another? In what ways can you connect the image with the text?

Please answer questions and then submit them in the assignment. Put your name in the document’s title. Eight points for questions 1-10, ten points each for questions 11 and 12. 1. What were the crusades, how did they begin, and how were they justified? 2. Describe the 1348 plague in Europe and how it changed human behavior. 3. What other calamities besides the plague occurred during the 14th century? What were the results? 4. What inventions during the middle ages and the Renaissance had the biggest impact on human culture in Western Europe? 5. What was a pilgrimage? Why did people go on them? 6. Describe what is happening in this image? Who is the central figure? Where might this image be located? How does it exemplify the era in which it was made? 7. Why was Socrates condemned to death? How did he handle his death sentence? What was the impact of his death for Athenians and the Western Heritage? 8. Name three Western legacies from ancient Egypt. How did the ancient Egyptians have a lasting impact on Western civilization? 9. How did Themistocles and the Greeks keep the Persians under Xerxes from invading? How did the trireme help? 10. Compare these two buildings. Identify them and say how they are alike and different and why we might want to know what they are. Where are they located? When were they constructed? What purposes did they serve? (5 points) 11. Compare ancient Rome and the contemporary United States. In what ways are the two superpowers similar? What are the similarities between their military strength, their colonization, the division of wealth, and their ways of appeasing the masses? In what ways did the Romans assume that assimilation to the Roman way would work for everyone they colonized? Has the U.S. done the same thing? In what ways is the Roman history different from the U.S. history of revolution against the British? Is the United States doomed to fail in the way ancient Rome did? 12. Compare the work of art you viewed in a museum with a work of text that we read in class or a work if art or architecture in the textbook. In what ways do they inform one another? In what ways can you connect the image with the text?

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Watch the video, and then answer the questions below. http://www.youtube.com/watch?v=XUF-T5JubDg#t=49 According to the video, which of the three scholars accepted the invasion of Iraq? A. Realists and liberals tended to reject it, but the constructivists thought it was a good idea. B. Realists tended to reject it, but the constructivists and liberals thought it was a good idea. C. Liberals tended to reject it, but the realists and constructivists thought it was a good idea. D. All of the scholars rejected it. E. None of the scholars rejected it. Which of the following was NOT given as a reason to be concerned about the war in Iraq? A. First and foremost, peace needed to prevail. B. The invasion was form of moralizing or crusading. C. The invasion undermined respect for International law. D. The invasion didn’t serve clear U.S. interests. E. The situation had the potential to become a quagmire. In the video, one of the topics under discussion concerns democratic governance. How much do their views conflict? A. Caleb Gallemore and J.D. Bowen disagree, because democracy is a social construct. B. Randall Schweller and J.D. Bowen disagree, because one side believes that democracy is impossible to spread while the other thinks it may be possible. C. Randall Schweller and Caleb Gallemore disagree with J.D. Bowen, because the first two view the attempt to spread democracy as a moralizing crusade. D. J.D. Bowen and Randall Schweller disagree with Caleb Gallemore, who doesn’t think that democracy can be spread successfully. E. All of the authors agree on the possibility of establishing democracy in Iraq. What sorts of things were on the minds of constructivists considering the war in Iraq? A. the history of colonialism, tensions between Islam and the West, and the United States’ perceived role as a world leader B. whether the war served U.S. interests C. whether the Coalition of the Willing would have forces sufficient to topple Saddam Hussein D. the likelihood that the war would result in a quagmire E. the importance of promoting human rights Professor Bowen says that liberals disagreed about invading Iraq but agreed on the form of government to be established there. What was that form of government? A. a loose confederacy of tribes B. a constitutional monarchy with negotiated rights for minorities C. a communist dictatorship with religious tolerance D. a democracy with respect for human rights E. a long-term military installation with UN forces overseeing government functions

Watch the video, and then answer the questions below. http://www.youtube.com/watch?v=XUF-T5JubDg#t=49 According to the video, which of the three scholars accepted the invasion of Iraq? A. Realists and liberals tended to reject it, but the constructivists thought it was a good idea. B. Realists tended to reject it, but the constructivists and liberals thought it was a good idea. C. Liberals tended to reject it, but the realists and constructivists thought it was a good idea. D. All of the scholars rejected it. E. None of the scholars rejected it. Which of the following was NOT given as a reason to be concerned about the war in Iraq? A. First and foremost, peace needed to prevail. B. The invasion was form of moralizing or crusading. C. The invasion undermined respect for International law. D. The invasion didn’t serve clear U.S. interests. E. The situation had the potential to become a quagmire. In the video, one of the topics under discussion concerns democratic governance. How much do their views conflict? A. Caleb Gallemore and J.D. Bowen disagree, because democracy is a social construct. B. Randall Schweller and J.D. Bowen disagree, because one side believes that democracy is impossible to spread while the other thinks it may be possible. C. Randall Schweller and Caleb Gallemore disagree with J.D. Bowen, because the first two view the attempt to spread democracy as a moralizing crusade. D. J.D. Bowen and Randall Schweller disagree with Caleb Gallemore, who doesn’t think that democracy can be spread successfully. E. All of the authors agree on the possibility of establishing democracy in Iraq. What sorts of things were on the minds of constructivists considering the war in Iraq? A. the history of colonialism, tensions between Islam and the West, and the United States’ perceived role as a world leader B. whether the war served U.S. interests C. whether the Coalition of the Willing would have forces sufficient to topple Saddam Hussein D. the likelihood that the war would result in a quagmire E. the importance of promoting human rights Professor Bowen says that liberals disagreed about invading Iraq but agreed on the form of government to be established there. What was that form of government? A. a loose confederacy of tribes B. a constitutional monarchy with negotiated rights for minorities C. a communist dictatorship with religious tolerance D. a democracy with respect for human rights E. a long-term military installation with UN forces overseeing government functions

Watch the video, and then answer the questions below. According … Read More...
1 | P a g e Lecture #2: Abortion (Warren) While studying this topic, we will ask whether it is morally permissible to intentionally terminate a pregnancy and, if so, whether certain restrictions should be placed upon such practices. Even though we will most often be speaking of terminating a fetus, biologists make further classifications: the zygote is the single cell resulting from the fusion of the egg and the sperm; the morula is the cluster of cells that travels through the fallopian tubes; the blastocyte exists once an outer shell of cells has formed around an inner group of cells; the embryo exists once the cells begin to take on specific functions (around the 15th day); the fetus comes into existence in the 8th week when the embryo gains a basic structural resemblance to the adult. Given these distinctions, there are certain kinds of non-fetal abortion—such as usage of RU-486 (the morning-after “abortion pill”)—though most of the writers we will study refer to fetal abortions. So now let us consider the “Classical Argument against Abortion”, which has been very influential: P1) It is wrong to kill innocent persons. P2) A fetus is an innocent person. C) It is wrong to kill a fetus. (Note that this argument has received various formulations, including those from Warren and Thomson which differ from the above. For this course, we will refer to the above formulation as the “Classical Argument”.) Before evaluating this argument, we should talk about terminology: A person is a member of the moral community; i.e., someone who has rights and/or duties. ‘Persons’ is the plural of ‘person’. ‘Person’ can be contrasted with ‘human being’; a human being is anyone who is genetically human (i.e., a member of Homo sapiens). ‘People’ (or ‘human beings’) is the plural of ‘human being’. Why does this matter? First, not all persons are human beings. For example, consider an alien from another planet who mentally resembled us. If he were to visit Earth, it would be morally reprehensible to kick him or to set him on fire because of the pain and suffering that these acts would cause. And, similarly, the alien would be morally condemnable if he were to propagate such acts on us; he has a moral duty not to act in those ways (again, assuming a certain mental resemblance to us). So, even though this alien is not a human being, he is nevertheless a person with the associative rights and/or duties. 2 | P a g e And, more controversially, maybe not all human beings are persons. For example, anencephalic infants—i.e., ones born without cerebral cortexes and therefore with severely limited cognitive abilities—certainly do not have duties since they are not capable of rational thought and autonomous action. Some philosophers have even argued that they do not have rights. Now let us return to the Classical Argument. It is valid insofar as, if the premises are true, then the conclusion has to be true. But maybe it commits equivocation, which is to say that it uses the same word in multiple senses; equivocation is an informal fallacy (i.e., attaches to arguments that are formally valid but otherwise fallacious). Consider the following: P1) I put my money in the bank. P2) The bank borders the river. C) I put my money somewhere that borders the river. This argument equivocates since ‘bank’ is being used in two different senses: in P1 it is used to represent a financial institution and, in P2, it is used to represent a geological feature. Returning to the classical argument, it could be argued that ‘person’ is being used in two different senses: in P1 it is used in its appropriate moral sense and, in P2, it is inappropriately used instead of ‘human being’. The critic might suggest that a more accurate way to represent the argument would be as follows: P1) It is wrong to kill innocent persons. P2) A fetus is a human being. C) It is wrong to kill a fetus. This argument is obviously invalid. So one way to criticize the Classical Argument is to say that it conflates two different concepts—viz., ‘person’ and ‘human being’—and therefore commits equivocation. However, the more straightforward way to attack the Classical Argument is just to deny its second premise and thus contend that the argument is unsound. This is the approach that Mary Anne Warren takes in “On the Moral and Legal Status of Abortion”. Why does Warren think that the second premise is false? Remember that we defined a person as “a member of the moral community.” And we said that an alien, for example, could be afforded moral status even though it is not a human being. Why do we think that this alien should not be tortured or set on fire? Warren thinks that, intuitively, we think that membership in the moral community is based upon possession of the following traits: 3 | P a g e 1. Consciousness of objects and events external and/or internal to the being and especially the capacity to feel pain; 2. Reasoning or rationality (i.e., the developed capacity to solve new and relatively complex problems); 3. Self-motivated activity (i.e., activity which is relatively independent of either genetic or direct external control); 4. Capacity to communicate (not necessarily verbal or linguistic); and 5. Possession of self-concepts and self-awareness. Warren then admits that, though all of the items on this list look promising, we need not require that a person have all of the items on this list. (4) is perhaps the most expendable: imagine someone who is fully paralyzed as well as deaf, these incapacities, which preclude communication, are not sufficient to justify torture. Similarly, we might be able to imagine certain psychological afflictions that negate (5) without compromising personhood. Warren suspects that (1) and (2) are might be sufficient to confer personhood, and thinks that (1)-(3) “quite probably” are sufficient. Note that, if she is right, we would not be able to torture chimps, let us say, but we could set plants on fire (and most likely ants as well). However, given Warren’s aims, she does not need to specify which of these traits are necessary or sufficient for personhood; all that she wants to observe is that the fetus has none of them! Therefore, regardless of which traits we want to require, Warren thinks that the fetus is not a person. Therefore she thinks that the Classical Argument is unsound and should be rejected. Even if we accept Warren’s refutation of the second premise, we might be inclined to say that, while the fetus is not (now) a person, it is a potential person: the fetus will hopefully mature into a being that possesses all five of the traits on Warren’s list. We might then propose the following adjustment to the Classical Argument: P1) It is wrong to kill all innocent persons. P2) A fetus is a potential person. C) It is wrong to kill a fetus. However, this argument is invalid. Warren grants that potentiality might serve as a prima facie reason (i.e., a reason that has some moral weight but which might be outweighed by other considerations) not to abort a fetus, but potentiality alone is insufficient to grant the fetus a moral right against being terminated. By analogy, consider the following argument: 4 | P a g e P1) The President has the right to declare war. P2) Mary is a potential President. C) Mary has the right to declare war. This argument is invalid since the premises are both true and the conclusion is false. By parity, the following argument is also invalid: P1) A person has a right to life. P2) A fetus is a potential person. C) A fetus has a right to life. Thus Warren thinks that considerations of potentiality are insufficient to undermine her argument that fetuses—which are potential persons but, she thinks, not persons—do not have a right to life.

1 | P a g e Lecture #2: Abortion (Warren) While studying this topic, we will ask whether it is morally permissible to intentionally terminate a pregnancy and, if so, whether certain restrictions should be placed upon such practices. Even though we will most often be speaking of terminating a fetus, biologists make further classifications: the zygote is the single cell resulting from the fusion of the egg and the sperm; the morula is the cluster of cells that travels through the fallopian tubes; the blastocyte exists once an outer shell of cells has formed around an inner group of cells; the embryo exists once the cells begin to take on specific functions (around the 15th day); the fetus comes into existence in the 8th week when the embryo gains a basic structural resemblance to the adult. Given these distinctions, there are certain kinds of non-fetal abortion—such as usage of RU-486 (the morning-after “abortion pill”)—though most of the writers we will study refer to fetal abortions. So now let us consider the “Classical Argument against Abortion”, which has been very influential: P1) It is wrong to kill innocent persons. P2) A fetus is an innocent person. C) It is wrong to kill a fetus. (Note that this argument has received various formulations, including those from Warren and Thomson which differ from the above. For this course, we will refer to the above formulation as the “Classical Argument”.) Before evaluating this argument, we should talk about terminology: A person is a member of the moral community; i.e., someone who has rights and/or duties. ‘Persons’ is the plural of ‘person’. ‘Person’ can be contrasted with ‘human being’; a human being is anyone who is genetically human (i.e., a member of Homo sapiens). ‘People’ (or ‘human beings’) is the plural of ‘human being’. Why does this matter? First, not all persons are human beings. For example, consider an alien from another planet who mentally resembled us. If he were to visit Earth, it would be morally reprehensible to kick him or to set him on fire because of the pain and suffering that these acts would cause. And, similarly, the alien would be morally condemnable if he were to propagate such acts on us; he has a moral duty not to act in those ways (again, assuming a certain mental resemblance to us). So, even though this alien is not a human being, he is nevertheless a person with the associative rights and/or duties. 2 | P a g e And, more controversially, maybe not all human beings are persons. For example, anencephalic infants—i.e., ones born without cerebral cortexes and therefore with severely limited cognitive abilities—certainly do not have duties since they are not capable of rational thought and autonomous action. Some philosophers have even argued that they do not have rights. Now let us return to the Classical Argument. It is valid insofar as, if the premises are true, then the conclusion has to be true. But maybe it commits equivocation, which is to say that it uses the same word in multiple senses; equivocation is an informal fallacy (i.e., attaches to arguments that are formally valid but otherwise fallacious). Consider the following: P1) I put my money in the bank. P2) The bank borders the river. C) I put my money somewhere that borders the river. This argument equivocates since ‘bank’ is being used in two different senses: in P1 it is used to represent a financial institution and, in P2, it is used to represent a geological feature. Returning to the classical argument, it could be argued that ‘person’ is being used in two different senses: in P1 it is used in its appropriate moral sense and, in P2, it is inappropriately used instead of ‘human being’. The critic might suggest that a more accurate way to represent the argument would be as follows: P1) It is wrong to kill innocent persons. P2) A fetus is a human being. C) It is wrong to kill a fetus. This argument is obviously invalid. So one way to criticize the Classical Argument is to say that it conflates two different concepts—viz., ‘person’ and ‘human being’—and therefore commits equivocation. However, the more straightforward way to attack the Classical Argument is just to deny its second premise and thus contend that the argument is unsound. This is the approach that Mary Anne Warren takes in “On the Moral and Legal Status of Abortion”. Why does Warren think that the second premise is false? Remember that we defined a person as “a member of the moral community.” And we said that an alien, for example, could be afforded moral status even though it is not a human being. Why do we think that this alien should not be tortured or set on fire? Warren thinks that, intuitively, we think that membership in the moral community is based upon possession of the following traits: 3 | P a g e 1. Consciousness of objects and events external and/or internal to the being and especially the capacity to feel pain; 2. Reasoning or rationality (i.e., the developed capacity to solve new and relatively complex problems); 3. Self-motivated activity (i.e., activity which is relatively independent of either genetic or direct external control); 4. Capacity to communicate (not necessarily verbal or linguistic); and 5. Possession of self-concepts and self-awareness. Warren then admits that, though all of the items on this list look promising, we need not require that a person have all of the items on this list. (4) is perhaps the most expendable: imagine someone who is fully paralyzed as well as deaf, these incapacities, which preclude communication, are not sufficient to justify torture. Similarly, we might be able to imagine certain psychological afflictions that negate (5) without compromising personhood. Warren suspects that (1) and (2) are might be sufficient to confer personhood, and thinks that (1)-(3) “quite probably” are sufficient. Note that, if she is right, we would not be able to torture chimps, let us say, but we could set plants on fire (and most likely ants as well). However, given Warren’s aims, she does not need to specify which of these traits are necessary or sufficient for personhood; all that she wants to observe is that the fetus has none of them! Therefore, regardless of which traits we want to require, Warren thinks that the fetus is not a person. Therefore she thinks that the Classical Argument is unsound and should be rejected. Even if we accept Warren’s refutation of the second premise, we might be inclined to say that, while the fetus is not (now) a person, it is a potential person: the fetus will hopefully mature into a being that possesses all five of the traits on Warren’s list. We might then propose the following adjustment to the Classical Argument: P1) It is wrong to kill all innocent persons. P2) A fetus is a potential person. C) It is wrong to kill a fetus. However, this argument is invalid. Warren grants that potentiality might serve as a prima facie reason (i.e., a reason that has some moral weight but which might be outweighed by other considerations) not to abort a fetus, but potentiality alone is insufficient to grant the fetus a moral right against being terminated. By analogy, consider the following argument: 4 | P a g e P1) The President has the right to declare war. P2) Mary is a potential President. C) Mary has the right to declare war. This argument is invalid since the premises are both true and the conclusion is false. By parity, the following argument is also invalid: P1) A person has a right to life. P2) A fetus is a potential person. C) A fetus has a right to life. Thus Warren thinks that considerations of potentiality are insufficient to undermine her argument that fetuses—which are potential persons but, she thinks, not persons—do not have a right to life.

Chapter 13 Practice Problems (Practice – no credit) Due: 11:59pm on Friday, May 16, 2014 You will receive no credit for items you complete after the assignment is due. Grading Policy A Matter of Some Gravity Learning Goal: To understand Newton’s law of gravitation and the distinction between inertial and gravitational masses. In this problem, you will practice using Newton’s law of gravitation. According to that law, the magnitude of the gravitational force between two small particles of masses and , separated by a distance , is given by , where is the universal gravitational constant, whose numerical value (in SI units) is . This formula applies not only to small particles, but also to spherical objects. In fact, the gravitational force between two uniform spheres is the same as if we concentrated all the mass of each sphere at its center. Thus, by modeling the Earth and the Moon as uniform spheres, you can use the particle approximation when calculating the force of gravity between them. Be careful in using Newton’s law to choose the correct value for . To calculate the force of gravitational attraction between two uniform spheres, the distance in the equation for Newton’s law of gravitation is the distance between the centers of the spheres. For instance, if a small object such as an elephant is located on the surface of the Earth, the radius of the Earth would be used in the equation. Note that the force of gravity acting on an object located near the surface of a planet is often called weight. Also note that in situations involving satellites, you are often given the altitude of the satellite, that is, the distance from the satellite to the surface of the planet; this is not the distance to be used in the formula for the law of gravitation. There is a potentially confusing issue involving mass. Mass is defined as a measure of an object’s inertia, that is, its ability to resist acceleration. Newton’s second law demonstrates the relationship between mass, acceleration, and the net force acting on an object: . We can now refer to this measure of inertia more precisely as the inertial mass. On the other hand, the masses of the particles that appear in the expression for the law of gravity seem to have nothing to do with inertia: Rather, they serve as a measure of the strength of gravitational interactions. It would be reasonable to call such a property gravitational mass. Does this mean that every object has two different masses? Generally speaking, yes. However, the good news is that according to the latest, highly precise, measurements, the inertial and the gravitational mass of an object are, in fact, equal to each other; it is an established consensus among physicists that there is only one mass after all, which is a measure of both the object’s inertia and its ability to engage in gravitational interactions. Note that this consensus, like everything else in science, is open to possible amendments in the future. In this problem, you will answer several questions that require the use of Newton’s law of gravitation. Part A Two particles are separated by a certain distance. The force of gravitational interaction between them is . Now the separation between the particles is tripled. Find the new force of gravitational Fg m1 m2 r Fg = G m1m2 r2 G 6.67 × 10−11 N m2 kg2 r r rEarth F  = m net a F0 interaction . Express your answer in terms of . ANSWER: Part B A satellite revolves around a planet at an altitude equal to the radius of the planet. The force of gravitational interaction between the satellite and the planet is . Then the satellite moves to a different orbit, so that its altitude is tripled. Find the new force of gravitational interaction . Express your answer in terms of . You did not open hints for this part. ANSWER: Part C A satellite revolves around a planet at an altitude equal to the radius of the planet. The force of gravitational interaction between the satellite and the planet is . Then the satellite is brought back to the surface of the planet. Find the new force of gravitational interaction . Express your answer in terms of . ANSWER: F1 F0 F1 = F0 F2 F0 F2 = F0 F4 F0 Typesetting math: 81% Part D Two satellites revolve around the Earth. Satellite A has mass and has an orbit of radius . Satellite B has mass and an orbit of unknown radius . The forces of gravitational attraction between each satellite and the Earth is the same. Find . Express your answer in terms of . ANSWER: Part E An adult elephant has a mass of about 5.0 tons. An adult elephant shrew has a mass of about 50 grams. How far from the center of the Earth should an elephant be placed so that its weight equals that of the elephant shrew on the surface of the Earth? The radius of the Earth is 6400 . ( .) Express your answer in kilometers. ANSWER: The table below gives the masses of the Earth, the Moon, and the Sun. Name Mass (kg) Earth Moon Sun F4 = m r 6m rb rb r rb = r km 1 ton = 103 kg r = km 5.97 × 1024 7.35 × 1022 1.99 × 1030 Typesetting math: 81% The average distance between the Earth and the Moon is . The average distance between the Earth and the Sun is . Use this information to answer the following questions. Part F Find the net gravitational force acting on the Earth in the Sun-Earth-Moon system during the new moon (when the moon is located directly between the Earth and the Sun). Express your answer in newtons to three significant figures. You did not open hints for this part. ANSWER: Part G Find the net gravitational force acting on the Earth in the Sun-Earth-Moon system during the full moon (when the Earth is located directly between the moon and the sun). Express your answer in newtons to three significant figures. ANSWER: ± Understanding Newton’s Law of Universal Gravitation Learning Goal: To understand Newton’s law of universal gravitation and be able to apply it in two-object situations and (collinear) three-object situations; to distinguish between the use of and . 3.84 × 108 m 1.50 × 1011 m Fnet Fnet = N Fnet Fnet = N Typesetting math: 81% G g In the late 1600s, Isaac Newton proposed a rule to quantify the attractive force known as gravity between objects that have mass, such as those shown in the figure. Newton’s law of universal gravitation describes the magnitude of the attractive gravitational force between two objects with masses and as , where is the distance between the centers of the two objects and is the gravitational constant. The gravitational force is attractive, so in the figure it pulls to the right on (toward ) and toward the left on (toward ). The gravitational force acting on is equal in size to, but exactly opposite in direction from, the gravitational force acting on , as required by Newton’s third law. The magnitude of both forces is calculated with the equation given above. The gravitational constant has the value and should not be confused with the magnitude of the gravitational free-fall acceleration constant, denoted by , which equals 9.80 near the surface of the earth. The size of in SI units is tiny. This means that gravitational forces are sizeable only in the vicinity of very massive objects, such as the earth. You are in fact gravitationally attracted toward all the objects around you, such as the computer you are using, but the size of that force is too small to be noticed without extremely sensitive equipment. Consider the earth following its nearly circular orbit (dashed curve) about the sun. The earth has mass and the sun has mass . They are separated, center to center, by . Part A What is the size of the gravitational force acting on the earth due to the sun? Express your answer in newtons. F  g m1 m2 Fg = G( ) m1m2 r2 r G m1 m2 m2 m1 m1 m2 G G = 6.67 × 10−11 N m2/kg2 g m/s2 G mearth = 5.98 × 1024 kg msun = 1.99 × 1030 kg r = 93 million miles = 150 million km Typesetting math: 81% You did not open hints for this part. ANSWER: Part B This question will be shown after you complete previous question(s). Part C This question will be shown after you complete previous question(s). Part D This question will be shown after you complete previous question(s). Part E This question will be shown after you complete previous question(s). Part F N Typesetting math: 81% This question will be shown after you complete previous question(s). Understanding Mass and Weight Learning Goal: To understand the distinction between mass and weight and to be able to calculate the weight of an object from its mass and Newton’s law of gravitation. The concepts of mass and weight are often confused. In fact, in everyday conversations, the word “weight” often replaces “mass,” as in “My weight is seventy-five kilograms” or “I need to lose some weight.” Of course, mass and weight are related; however, they are also very different. Mass, as you recall, is a measure of an object’s inertia (ability to resist acceleration). Newton’s 2nd law demonstrates the relationship among an object’s mass, its acceleration, and the net force acting on it: . Mass is an intrinsic property of an object and is independent of the object’s location. Weight, in contrast, is defined as the force due to gravity acting on the object. That force depends on the strength of the gravitational field of the planet: , where is the weight of an object, is the mass of that object, and is the local acceleration due to gravity (in other words, the strength of the gravitational field at the location of the object). Weight, unlike mass, is not an intrinsic property of the object; it is determined by both the object and its location. Part A Which of the following quantities represent mass? Check all that apply. ANSWER: Fnet = ma w = mg w m g 12.0 lbs 0.34 g 120 kg 1600 kN 0.34 m 411 cm 899 MN Typesetting math: 81% Part B This question will be shown after you complete previous question(s). Using the universal law of gravity, we can find the weight of an object feeling the gravitational pull of a nearby planet. We can write an expression , where is the weight of the object, is the gravitational constant, is the mass of that object, is mass of the planet, and is the distance from the center of the planet to the object. If the object is on the surface of the planet, is simply the radius of the planet. Part C The gravitational field on the surface of the earth is stronger than that on the surface of the moon. If a rock is transported from the moon to the earth, which properties of the rock change? ANSWER: Part D This question will be shown after you complete previous question(s). Part E If acceleration due to gravity on the earth is , which formula gives the acceleration due to gravity on Loput? You did not open hints for this part. ANSWER: w = GmM/r2 w G m M r r mass only weight only both mass and weight neither mass nor weight g Typesetting math: 81% Part F This question will be shown after you complete previous question(s). Part G This question will be shown after you complete previous question(s). Part H This question will be shown after you complete previous question(s). ± Weight on a Neutron Star Neutron stars, such as the one at the center of the Crab Nebula, have about the same mass as our sun but a much smaller diameter. g 1.7 5.6 g 1.72 5.6 g 1.72 5.62 g 5.6 1.7 g 5.62 1.72 g 5.6 1.72 Typesetting math: 81% Part A If you weigh 655 on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 19.0 ? Take the mass of the sun to be = 1.99×1030 , the gravitational constant to be = 6.67×10−11 , and the acceleration due to gravity at the earth’s surface to be = 9.810 . Express your weight in newtons. You did not open hints for this part. ANSWER: ± Escape Velocity Learning Goal: To introduce you to the concept of escape velocity for a rocket. The escape velocity is defined to be the minimum speed with which an object of mass must move to escape from the gravitational attraction of a much larger body, such as a planet of total mass . The escape velocity is a function of the distance of the object from the center of the planet , but unless otherwise specified this distance is taken to be the radius of the planet because it addresses the question “How fast does my rocket have to go to escape from the surface of the planet?” Part A The key to making a concise mathematical definition of escape velocity is to consider the energy. If an object is launched at its escape velocity, what is the total mechanical energy of the object at a very large (i.e., infinite) distance from the planet? Follow the usual convention and take the gravitational potential energy to be zero at very large distances. You did not open hints for this part. ANSWER: N km ms kg G N m2/kg2 g m/s2 wstar wstar = N m M R Etotal Typesetting math: 81% Consider the motion of an object between a point close to the planet and a point very very far from the planet. Indicate whether the following statements are true or false. Part B Angular momentum about the center of the planet is conserved. ANSWER: Part C Total mechanical energy is conserved. ANSWER: Part D Kinetic energy is conserved. ANSWER: Etotal = true false true false Typesetting math: 81% Part E This question will be shown after you complete previous question(s). Part F This question will be shown after you complete previous question(s). A Satellite in a Circular Orbit Consider a satellite of mass that orbits a planet of mass in a circle a distance from the center of the planet. The satellite’s mass is negligible compared with that of the planet. Indicate whether each of the statements in this problem is true or false. Part A The information given is sufficient to uniquely specify the speed, potential energy, and angular momentum of the satellite. You did not open hints for this part. ANSWER: true false m1 m2 r true false Typesetting math: 81% Part B The total mechanical energy of the satellite is conserved. You did not open hints for this part. ANSWER: Part C The linear momentum vector of the satellite is conserved. You did not open hints for this part. ANSWER: Part D The angular momentum of the satellite about the center of the planet is conserved. You did not open hints for this part. ANSWER: true false true false Typesetting math: 81% Part E The equations that express the conservation laws of total mechanical energy and linear momentum are sufficient to solve for the speed necessary to maintain a circular orbit at without using . You did not open hints for this part. ANSWER: At the Galaxy’s Core Astronomers have observed a small, massive object at the center of our Milky Way galaxy. A ring of material orbits this massive object; the ring has a diameter of about 15 light years and an orbital speed of about 200 . Part A Determine the mass of the massive object at the center of the Milky Way galaxy. Take the distance of one light year to be . Express your answer in kilograms. You did not open hints for this part. true false R F = ma true false km/s M 9.461 × 1015 m Typesetting math: 81% ANSWER: Part B This question will be shown after you complete previous question(s). Part C This question will be shown after you complete previous question(s). Part D This question will be shown after you complete previous question(s). Part E This question will be shown after you complete previous question(s). Properties of Circular Orbits Learning Goal: To teach you how to find the parameters characterizing an object in a circular orbit around a much heavier body like the earth. M = kg Typesetting math: 81% The motivation for Isaac Newton to discover his laws of motion was to explain the properties of planetary orbits that were observed by Tycho Brahe and analyzed by Johannes Kepler. A good starting point for understanding this (as well as the speed of the space shuttle and the height of geostationary satellites) is the simplest orbit–a circular one. This problem concerns the properties of circular orbits for a satellite orbiting a planet of mass . For all parts of this problem, where appropriate, use for the universal gravitational constant. Part A Find the orbital speed for a satellite in a circular orbit of radius . Express the orbital speed in terms of , , and . You did not open hints for this part. ANSWER: Part B Find the kinetic energy of a satellite with mass in a circular orbit with radius . Express your answer in terms of \texttip{m}{m}, \texttip{M}{M}, \texttip{G}{G}, and \texttip{R}{R}. ANSWER: Part C M G v R G M R v = K m R \texttip{K}{K} = Typesetting math: 81% This question will be shown after you complete previous question(s). Part D Find the orbital period \texttip{T}{T}. Express your answer in terms of \texttip{G}{G}, \texttip{M}{M}, \texttip{R}{R}, and \texttip{\pi }{pi}. You did not open hints for this part. ANSWER: Part E This question will be shown after you complete previous question(s). Part F Find \texttip{L}{L}, the magnitude of the angular momentum of the satellite with respect to the center of the planet. Express your answer in terms of \texttip{m}{m}, \texttip{M}{M}, \texttip{G}{G}, and \texttip{R}{R}. You did not open hints for this part. ANSWER: \texttip{T}{T} = Typesetting math: 81% Part G The quantities \texttip{v}{v}, \texttip{K}{K}, \texttip{U}{U}, and \texttip{L}{L} all represent physical quantities characterizing the orbit that depend on radius \texttip{R}{R}. Indicate the exponent (power) of the radial dependence of the absolute value of each. Express your answer as a comma-separated list of exponents corresponding to \texttip{v}{v}, \texttip{K}{K}, \texttip{U}{U}, and \texttip{L}{L}, in that order. For example, -1,-1/2,-0.5,-3/2 would mean v \propto R^{-1}, K \propto R^{-1/2}, and so forth. You did not open hints for this part. ANSWER: Score Summary: Your score on this assignment is 0%. You received 0 out of a possible total of 0 points. \texttip{L}{L} = Typesetting math: 81%

Chapter 13 Practice Problems (Practice – no credit) Due: 11:59pm on Friday, May 16, 2014 You will receive no credit for items you complete after the assignment is due. Grading Policy A Matter of Some Gravity Learning Goal: To understand Newton’s law of gravitation and the distinction between inertial and gravitational masses. In this problem, you will practice using Newton’s law of gravitation. According to that law, the magnitude of the gravitational force between two small particles of masses and , separated by a distance , is given by , where is the universal gravitational constant, whose numerical value (in SI units) is . This formula applies not only to small particles, but also to spherical objects. In fact, the gravitational force between two uniform spheres is the same as if we concentrated all the mass of each sphere at its center. Thus, by modeling the Earth and the Moon as uniform spheres, you can use the particle approximation when calculating the force of gravity between them. Be careful in using Newton’s law to choose the correct value for . To calculate the force of gravitational attraction between two uniform spheres, the distance in the equation for Newton’s law of gravitation is the distance between the centers of the spheres. For instance, if a small object such as an elephant is located on the surface of the Earth, the radius of the Earth would be used in the equation. Note that the force of gravity acting on an object located near the surface of a planet is often called weight. Also note that in situations involving satellites, you are often given the altitude of the satellite, that is, the distance from the satellite to the surface of the planet; this is not the distance to be used in the formula for the law of gravitation. There is a potentially confusing issue involving mass. Mass is defined as a measure of an object’s inertia, that is, its ability to resist acceleration. Newton’s second law demonstrates the relationship between mass, acceleration, and the net force acting on an object: . We can now refer to this measure of inertia more precisely as the inertial mass. On the other hand, the masses of the particles that appear in the expression for the law of gravity seem to have nothing to do with inertia: Rather, they serve as a measure of the strength of gravitational interactions. It would be reasonable to call such a property gravitational mass. Does this mean that every object has two different masses? Generally speaking, yes. However, the good news is that according to the latest, highly precise, measurements, the inertial and the gravitational mass of an object are, in fact, equal to each other; it is an established consensus among physicists that there is only one mass after all, which is a measure of both the object’s inertia and its ability to engage in gravitational interactions. Note that this consensus, like everything else in science, is open to possible amendments in the future. In this problem, you will answer several questions that require the use of Newton’s law of gravitation. Part A Two particles are separated by a certain distance. The force of gravitational interaction between them is . Now the separation between the particles is tripled. Find the new force of gravitational Fg m1 m2 r Fg = G m1m2 r2 G 6.67 × 10−11 N m2 kg2 r r rEarth F  = m net a F0 interaction . Express your answer in terms of . ANSWER: Part B A satellite revolves around a planet at an altitude equal to the radius of the planet. The force of gravitational interaction between the satellite and the planet is . Then the satellite moves to a different orbit, so that its altitude is tripled. Find the new force of gravitational interaction . Express your answer in terms of . You did not open hints for this part. ANSWER: Part C A satellite revolves around a planet at an altitude equal to the radius of the planet. The force of gravitational interaction between the satellite and the planet is . Then the satellite is brought back to the surface of the planet. Find the new force of gravitational interaction . Express your answer in terms of . ANSWER: F1 F0 F1 = F0 F2 F0 F2 = F0 F4 F0 Typesetting math: 81% Part D Two satellites revolve around the Earth. Satellite A has mass and has an orbit of radius . Satellite B has mass and an orbit of unknown radius . The forces of gravitational attraction between each satellite and the Earth is the same. Find . Express your answer in terms of . ANSWER: Part E An adult elephant has a mass of about 5.0 tons. An adult elephant shrew has a mass of about 50 grams. How far from the center of the Earth should an elephant be placed so that its weight equals that of the elephant shrew on the surface of the Earth? The radius of the Earth is 6400 . ( .) Express your answer in kilometers. ANSWER: The table below gives the masses of the Earth, the Moon, and the Sun. Name Mass (kg) Earth Moon Sun F4 = m r 6m rb rb r rb = r km 1 ton = 103 kg r = km 5.97 × 1024 7.35 × 1022 1.99 × 1030 Typesetting math: 81% The average distance between the Earth and the Moon is . The average distance between the Earth and the Sun is . Use this information to answer the following questions. Part F Find the net gravitational force acting on the Earth in the Sun-Earth-Moon system during the new moon (when the moon is located directly between the Earth and the Sun). Express your answer in newtons to three significant figures. You did not open hints for this part. ANSWER: Part G Find the net gravitational force acting on the Earth in the Sun-Earth-Moon system during the full moon (when the Earth is located directly between the moon and the sun). Express your answer in newtons to three significant figures. ANSWER: ± Understanding Newton’s Law of Universal Gravitation Learning Goal: To understand Newton’s law of universal gravitation and be able to apply it in two-object situations and (collinear) three-object situations; to distinguish between the use of and . 3.84 × 108 m 1.50 × 1011 m Fnet Fnet = N Fnet Fnet = N Typesetting math: 81% G g In the late 1600s, Isaac Newton proposed a rule to quantify the attractive force known as gravity between objects that have mass, such as those shown in the figure. Newton’s law of universal gravitation describes the magnitude of the attractive gravitational force between two objects with masses and as , where is the distance between the centers of the two objects and is the gravitational constant. The gravitational force is attractive, so in the figure it pulls to the right on (toward ) and toward the left on (toward ). The gravitational force acting on is equal in size to, but exactly opposite in direction from, the gravitational force acting on , as required by Newton’s third law. The magnitude of both forces is calculated with the equation given above. The gravitational constant has the value and should not be confused with the magnitude of the gravitational free-fall acceleration constant, denoted by , which equals 9.80 near the surface of the earth. The size of in SI units is tiny. This means that gravitational forces are sizeable only in the vicinity of very massive objects, such as the earth. You are in fact gravitationally attracted toward all the objects around you, such as the computer you are using, but the size of that force is too small to be noticed without extremely sensitive equipment. Consider the earth following its nearly circular orbit (dashed curve) about the sun. The earth has mass and the sun has mass . They are separated, center to center, by . Part A What is the size of the gravitational force acting on the earth due to the sun? Express your answer in newtons. F  g m1 m2 Fg = G( ) m1m2 r2 r G m1 m2 m2 m1 m1 m2 G G = 6.67 × 10−11 N m2/kg2 g m/s2 G mearth = 5.98 × 1024 kg msun = 1.99 × 1030 kg r = 93 million miles = 150 million km Typesetting math: 81% You did not open hints for this part. ANSWER: Part B This question will be shown after you complete previous question(s). Part C This question will be shown after you complete previous question(s). Part D This question will be shown after you complete previous question(s). Part E This question will be shown after you complete previous question(s). Part F N Typesetting math: 81% This question will be shown after you complete previous question(s). Understanding Mass and Weight Learning Goal: To understand the distinction between mass and weight and to be able to calculate the weight of an object from its mass and Newton’s law of gravitation. The concepts of mass and weight are often confused. In fact, in everyday conversations, the word “weight” often replaces “mass,” as in “My weight is seventy-five kilograms” or “I need to lose some weight.” Of course, mass and weight are related; however, they are also very different. Mass, as you recall, is a measure of an object’s inertia (ability to resist acceleration). Newton’s 2nd law demonstrates the relationship among an object’s mass, its acceleration, and the net force acting on it: . Mass is an intrinsic property of an object and is independent of the object’s location. Weight, in contrast, is defined as the force due to gravity acting on the object. That force depends on the strength of the gravitational field of the planet: , where is the weight of an object, is the mass of that object, and is the local acceleration due to gravity (in other words, the strength of the gravitational field at the location of the object). Weight, unlike mass, is not an intrinsic property of the object; it is determined by both the object and its location. Part A Which of the following quantities represent mass? Check all that apply. ANSWER: Fnet = ma w = mg w m g 12.0 lbs 0.34 g 120 kg 1600 kN 0.34 m 411 cm 899 MN Typesetting math: 81% Part B This question will be shown after you complete previous question(s). Using the universal law of gravity, we can find the weight of an object feeling the gravitational pull of a nearby planet. We can write an expression , where is the weight of the object, is the gravitational constant, is the mass of that object, is mass of the planet, and is the distance from the center of the planet to the object. If the object is on the surface of the planet, is simply the radius of the planet. Part C The gravitational field on the surface of the earth is stronger than that on the surface of the moon. If a rock is transported from the moon to the earth, which properties of the rock change? ANSWER: Part D This question will be shown after you complete previous question(s). Part E If acceleration due to gravity on the earth is , which formula gives the acceleration due to gravity on Loput? You did not open hints for this part. ANSWER: w = GmM/r2 w G m M r r mass only weight only both mass and weight neither mass nor weight g Typesetting math: 81% Part F This question will be shown after you complete previous question(s). Part G This question will be shown after you complete previous question(s). Part H This question will be shown after you complete previous question(s). ± Weight on a Neutron Star Neutron stars, such as the one at the center of the Crab Nebula, have about the same mass as our sun but a much smaller diameter. g 1.7 5.6 g 1.72 5.6 g 1.72 5.62 g 5.6 1.7 g 5.62 1.72 g 5.6 1.72 Typesetting math: 81% Part A If you weigh 655 on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 19.0 ? Take the mass of the sun to be = 1.99×1030 , the gravitational constant to be = 6.67×10−11 , and the acceleration due to gravity at the earth’s surface to be = 9.810 . Express your weight in newtons. You did not open hints for this part. ANSWER: ± Escape Velocity Learning Goal: To introduce you to the concept of escape velocity for a rocket. The escape velocity is defined to be the minimum speed with which an object of mass must move to escape from the gravitational attraction of a much larger body, such as a planet of total mass . The escape velocity is a function of the distance of the object from the center of the planet , but unless otherwise specified this distance is taken to be the radius of the planet because it addresses the question “How fast does my rocket have to go to escape from the surface of the planet?” Part A The key to making a concise mathematical definition of escape velocity is to consider the energy. If an object is launched at its escape velocity, what is the total mechanical energy of the object at a very large (i.e., infinite) distance from the planet? Follow the usual convention and take the gravitational potential energy to be zero at very large distances. You did not open hints for this part. ANSWER: N km ms kg G N m2/kg2 g m/s2 wstar wstar = N m M R Etotal Typesetting math: 81% Consider the motion of an object between a point close to the planet and a point very very far from the planet. Indicate whether the following statements are true or false. Part B Angular momentum about the center of the planet is conserved. ANSWER: Part C Total mechanical energy is conserved. ANSWER: Part D Kinetic energy is conserved. ANSWER: Etotal = true false true false Typesetting math: 81% Part E This question will be shown after you complete previous question(s). Part F This question will be shown after you complete previous question(s). A Satellite in a Circular Orbit Consider a satellite of mass that orbits a planet of mass in a circle a distance from the center of the planet. The satellite’s mass is negligible compared with that of the planet. Indicate whether each of the statements in this problem is true or false. Part A The information given is sufficient to uniquely specify the speed, potential energy, and angular momentum of the satellite. You did not open hints for this part. ANSWER: true false m1 m2 r true false Typesetting math: 81% Part B The total mechanical energy of the satellite is conserved. You did not open hints for this part. ANSWER: Part C The linear momentum vector of the satellite is conserved. You did not open hints for this part. ANSWER: Part D The angular momentum of the satellite about the center of the planet is conserved. You did not open hints for this part. ANSWER: true false true false Typesetting math: 81% Part E The equations that express the conservation laws of total mechanical energy and linear momentum are sufficient to solve for the speed necessary to maintain a circular orbit at without using . You did not open hints for this part. ANSWER: At the Galaxy’s Core Astronomers have observed a small, massive object at the center of our Milky Way galaxy. A ring of material orbits this massive object; the ring has a diameter of about 15 light years and an orbital speed of about 200 . Part A Determine the mass of the massive object at the center of the Milky Way galaxy. Take the distance of one light year to be . Express your answer in kilograms. You did not open hints for this part. true false R F = ma true false km/s M 9.461 × 1015 m Typesetting math: 81% ANSWER: Part B This question will be shown after you complete previous question(s). Part C This question will be shown after you complete previous question(s). Part D This question will be shown after you complete previous question(s). Part E This question will be shown after you complete previous question(s). Properties of Circular Orbits Learning Goal: To teach you how to find the parameters characterizing an object in a circular orbit around a much heavier body like the earth. M = kg Typesetting math: 81% The motivation for Isaac Newton to discover his laws of motion was to explain the properties of planetary orbits that were observed by Tycho Brahe and analyzed by Johannes Kepler. A good starting point for understanding this (as well as the speed of the space shuttle and the height of geostationary satellites) is the simplest orbit–a circular one. This problem concerns the properties of circular orbits for a satellite orbiting a planet of mass . For all parts of this problem, where appropriate, use for the universal gravitational constant. Part A Find the orbital speed for a satellite in a circular orbit of radius . Express the orbital speed in terms of , , and . You did not open hints for this part. ANSWER: Part B Find the kinetic energy of a satellite with mass in a circular orbit with radius . Express your answer in terms of \texttip{m}{m}, \texttip{M}{M}, \texttip{G}{G}, and \texttip{R}{R}. ANSWER: Part C M G v R G M R v = K m R \texttip{K}{K} = Typesetting math: 81% This question will be shown after you complete previous question(s). Part D Find the orbital period \texttip{T}{T}. Express your answer in terms of \texttip{G}{G}, \texttip{M}{M}, \texttip{R}{R}, and \texttip{\pi }{pi}. You did not open hints for this part. ANSWER: Part E This question will be shown after you complete previous question(s). Part F Find \texttip{L}{L}, the magnitude of the angular momentum of the satellite with respect to the center of the planet. Express your answer in terms of \texttip{m}{m}, \texttip{M}{M}, \texttip{G}{G}, and \texttip{R}{R}. You did not open hints for this part. ANSWER: \texttip{T}{T} = Typesetting math: 81% Part G The quantities \texttip{v}{v}, \texttip{K}{K}, \texttip{U}{U}, and \texttip{L}{L} all represent physical quantities characterizing the orbit that depend on radius \texttip{R}{R}. Indicate the exponent (power) of the radial dependence of the absolute value of each. Express your answer as a comma-separated list of exponents corresponding to \texttip{v}{v}, \texttip{K}{K}, \texttip{U}{U}, and \texttip{L}{L}, in that order. For example, -1,-1/2,-0.5,-3/2 would mean v \propto R^{-1}, K \propto R^{-1/2}, and so forth. You did not open hints for this part. ANSWER: Score Summary: Your score on this assignment is 0%. You received 0 out of a possible total of 0 points. \texttip{L}{L} = Typesetting math: 81%

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1-In _____ auctions, there is one buyer who wants to buy a product. Suppliers submit bids, and the lowest bid wins. forward static reverse physical simple 2- Which of the following is NOT an effect that e-commerce has had on organizations? E-commerce enables smaller businesses to operate in areas dominated by larger companies. E-commerce increases the number of potential customers to whom the company can market its products. E-commerce is a costly medium for increasing market share. E-commerce removes many barriers for start-up businesses. E-commerce makes it easy to reach customers around the world. 3- The degree of digitization relates to all of the following except: the product or service sold the process by which the product is produced the delivery agent or intermediary the size of e-commerce transactions None of these 4- In _______ e-commerce, the sellers and buyers are organizations. government-to-citizen consumer-to-consumer business-to-business business-to-consumer consumer-to-business 5- BitTorrent uses a process called _____, which eliminates file-sharing bottlenecks by having everyone share little pieces of a file at the same time. leeching collaboration packet switching torrents swarming 6- eBay uses a _____ auction. forward static reverse physical simple 7- A(n) _____ is a network designed to serve the internal informational needs of a single organization. global network extranet internet intranet World Wide Web 8- _____ are internet access points that are located in public places, such as libraries and airports. Clients Servers Internet access computers Network computer Internet kiosks 9- Consider this domain name: www.business.gsu.edu. The “edu” is the _______. top-level domain URL website locator name of the computer address of the webmaster 10- Internet service providers connect to one another through _____. internet connection points common carrier connection points network access points network connection points an extranet

1-In _____ auctions, there is one buyer who wants to buy a product. Suppliers submit bids, and the lowest bid wins. forward static reverse physical simple 2- Which of the following is NOT an effect that e-commerce has had on organizations? E-commerce enables smaller businesses to operate in areas dominated by larger companies. E-commerce increases the number of potential customers to whom the company can market its products. E-commerce is a costly medium for increasing market share. E-commerce removes many barriers for start-up businesses. E-commerce makes it easy to reach customers around the world. 3- The degree of digitization relates to all of the following except: the product or service sold the process by which the product is produced the delivery agent or intermediary the size of e-commerce transactions None of these 4- In _______ e-commerce, the sellers and buyers are organizations. government-to-citizen consumer-to-consumer business-to-business business-to-consumer consumer-to-business 5- BitTorrent uses a process called _____, which eliminates file-sharing bottlenecks by having everyone share little pieces of a file at the same time. leeching collaboration packet switching torrents swarming 6- eBay uses a _____ auction. forward static reverse physical simple 7- A(n) _____ is a network designed to serve the internal informational needs of a single organization. global network extranet internet intranet World Wide Web 8- _____ are internet access points that are located in public places, such as libraries and airports. Clients Servers Internet access computers Network computer Internet kiosks 9- Consider this domain name: www.business.gsu.edu. The “edu” is the _______. top-level domain URL website locator name of the computer address of the webmaster 10- Internet service providers connect to one another through _____. internet connection points common carrier connection points network access points network connection points an extranet

1-In _____ auctions, there is one buyer who wants to … Read More...
6. The primary operating goal of a publicly-owned firm trying to best serve its stockholders should be to a. Maximize managers’ own interests, which are by definition consistent with maximizing shareholders’ wealth. b. Maximize the firm’s expected EPS, which must also maximize the firm’s price per share. c. Minimize the firm’s risks because most stockholders dislike risk. In turn, this will maximize the firm’s stock price. d. Use a well-structured managerial compensation package to reduce conflicts that may exist between stockholders and managers. e. Since it is impossible to measure a stock’s intrinsic value, the text states that it is better for managers to attempt to maximize the current stock price than its intrinsic value.

6. The primary operating goal of a publicly-owned firm trying to best serve its stockholders should be to a. Maximize managers’ own interests, which are by definition consistent with maximizing shareholders’ wealth. b. Maximize the firm’s expected EPS, which must also maximize the firm’s price per share. c. Minimize the firm’s risks because most stockholders dislike risk. In turn, this will maximize the firm’s stock price. d. Use a well-structured managerial compensation package to reduce conflicts that may exist between stockholders and managers. e. Since it is impossible to measure a stock’s intrinsic value, the text states that it is better for managers to attempt to maximize the current stock price than its intrinsic value.

Answer: d