Chapter 10 Practice Problems (Practice – no credit) Due: 11:59pm on Friday, April 18, 2014 You will receive no credit for items you complete after the assignment is due. Grading Policy A One-Dimensional Inelastic Collision Block 1, of mass = 3.70 , moves along a frictionless air track with speed = 15.0 . It collides with block 2, of mass = 19.0 , which was initially at rest. The blocks stick together after the collision. Part A Find the magnitude of the total initial momentum of the two-block system. Express your answer numerically. You did not open hints for this part. ANSWER: m1 kg v1 m/s m2 kg pi Part B Find , the magnitude of the final velocity of the two-block system. Express your answer numerically. You did not open hints for this part. ANSWER: Part C What is the change in the two-block system’s kinetic energy due to the collision? Express your answer numerically in joules. You did not open hints for this part. ANSWER: pi = kg m/s vf vf = m/s K = Kfinal − Kinitial K = J Conservation of Energy Ranking Task Six pendulums of various masses are released from various heights above a tabletop, as shown in the figures below. All the pendulums have the same length and are mounted such that at the vertical position their lowest points are the height of the tabletop and just do not strike the tabletop when released. Assume that the size of each bob is negligible. Part A Rank each pendulum on the basis of its initial gravitational potential energy (before being released) relative to the tabletop. Rank from largest to smallest To rank items as equivalent, overlap them. You did not open hints for this part. ANSWER: m h 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). Momentum and Kinetic Energy Consider two objects (Object 1 and Object 2) moving in the same direction on a frictionless surface. Object 1 moves with speed and has mass . Object 2 moves with speed and has mass . Part A Which object has the larger magnitude of its momentum? You did not open hints for this part. ANSWER: Part B Which object has the larger kinetic energy? You did not open hints for this part. ANSWER: v1 = v m1 = 2m v2 = 2v m2 = m Object 1 has the greater magnitude of its momentum. Object 2 has the greater magnitude of its momentum. Both objects have the same magnitude of their momenta. Object 1 has the greater kinetic energy. Object 2 has the greater kinetic energy. The objects have the same kinetic energy. Projectile Motion and Conservation of Energy Ranking Task Part A Six baseball throws are shown below. In each case the baseball is thrown at the same initial speed and from the same height above the ground. Assume that the effects of air resistance are negligible. Rank these throws according to the speed of the baseball the instant before it hits the ground. Rank from largest to smallest. To rank items as equivalent, overlap them. You did not open hints for this part. ANSWER: H PSS 10.1 Conservation of Mechanical Energy Learning Goal: To practice Problem-Solving Strategy 10.1 for conservation of mechanical energy problems. Tarzan, in one tree, sights Jane in another tree. He grabs the end of a vine with length 20 that makes an angle of 45 with the vertical, steps off his tree limb, and swings down and then up to Jane’s open arms. When he arrives, his vine makes an angle of 30 with the vertical. Determine whether he gives her a tender embrace or knocks her off her limb by calculating Tarzan’s speed just before he reaches Jane. You can ignore air resistance and the mass of the vine. PROBLEM-SOLVING STRATEGY 10.1 Conservation of mechanical energy MODEL: Choose a system without friction or other losses of mechanical energy. m VISUALIZE: Draw a before-and-after pictorial representation. Define symbols that will be used in the problem, list known values, and identify what you’re trying to find. SOLVE: The mathematical representation is based on the law of conservation of mechanical energy: . ASSESS: Check that your result has the correct units, is reasonable, and answers the question. Model The problem does not involve friction, nor are there losses of mechanical energy, so conservation of mechanical energy applies. Model Tarzan and the vine as a pendulum. Visualize Part A Which of the following sketches can be used in drawing a before-and-after pictorial representation? ANSWER: Kf + Uf = Ki + Ui Solve Part B What is Tarzan’s speed just before he reaches Jane? Express your answer in meters per second to two significant figures. You did not open hints for this part. ANSWER: Assess Part C This question will be shown after you complete previous question(s). Bungee Jumping Diagram A Diagram B Diagram C Diagram D vf vf = m/s Kate, a bungee jumper, wants to jump off the edge of a bridge that spans a river below. Kate has a mass , and the surface of the bridge is a height above the water. The bungee cord, which has length when unstretched, will first straighten and then stretch as Kate falls. Assume the following: The bungee cord behaves as an ideal spring once it begins to stretch, with spring constant . Kate doesn’t actually jump but simply steps off the edge of the bridge and falls straight downward. Kate’s height is negligible compared to the length of the bungee cord. Hence, she can be treated as a point particle. Use for the magnitude of the acceleration due to gravity. Part A How far below the bridge will Kate eventually be hanging, once she stops oscillating and comes finally to rest? Assume that she doesn’t touch the water. Express the distance in terms of quantities given in the problem introduction. You did not open hints for this part. ANSWER: Part B This question will be shown after you complete previous question(s). Spinning Mass on a Spring An object of mass is attached to a spring with spring constant whose unstretched length is , and whose far end is fixed to a shaft that is rotating with angular speed . Neglect gravity and assume that the mass rotates with angular speed as shown. When solving this problem use an inertial coordinate system, as drawn here. m h L k g d = M k L Part A Given the angular speed , find the radius at which the mass rotates without moving toward or away from the origin. Express the radius in terms of , , , and . You did not open hints for this part. ANSWER: Part B This question will be shown after you complete previous question(s). Part C R( ) k L M R( ) = This question will be shown after you complete previous question(s). Part D This question will be shown after you complete previous question(s). ± Baby Bounce with a Hooke One of the pioneers of modern science, Sir Robert Hooke (1635-1703), studied the elastic properties of springs and formulated the law that bears his name. Hooke found the relationship among the force a spring exerts, , the distance from equilibrium the end of the spring is displaced, , and a number called the spring constant (or, sometimes, the force constant of the spring). According to Hooke, the force of the spring is directly proportional to its displacement from equilibrium, or . In its scalar form, this equation is simply . The negative sign indicates that the force that the spring exerts and its displacement have opposite directions. The value of depends on the geometry and the material of the spring; it can be easily determined experimentally using this scalar equation. Toy makers have always been interested in springs for the entertainment value of the motion they produce. One well-known application is a baby bouncer,which consists of a harness seat for a toddler, attached to a spring. The entire contraption hooks onto the top of a doorway. The idea is for the baby to hang in the seat with his or her feet just touching the ground so that a good push up will get the baby bouncing, providing potentially hours of entertainment. F x k F = −kx F = −kx k Part A The following chart and accompanying graph depict an experiment to determine the spring constant for a baby bouncer. Displacement from equilibrium, ( ) Force exerted on the spring, ( ) 0 0 0.005 2.5 0.010 5.0 0.015 7.5 0.020 10 What is the spring constant of the spring being tested for the baby bouncer? Express your answer to two significant figures in newtons per meter. You did not open hints for this part. ANSWER: Part B This question will be shown after you complete previous question(s). Shooting a ball into a box Two children are trying to shoot a marble of mass into a small box using a spring-loaded gun that is fixed on a table and shoots horizontally from the edge of the table. The edge of the table is a height above the top of the box (the height of which is negligibly small), and the center of the box is a distance from the edge of the table. x m F N k k = N/m m H d The spring has a spring constant . The first child compresses the spring a distance and finds that the marble falls short of its target by a horizontal distance . Part A By what distance, , should the second child compress the spring so that the marble lands in the middle of the box? (Assume that height of the box is negligible, so that there is no chance that the marble will hit the side of the box before it lands in the bottom.) Express the distance in terms of , , , , and . You did not open hints for this part. ANSWER: Part B This question will be shown after you complete previous question(s). k x1 d12 x2 m k g H d x2 = Elastic Collision in One Dimension Block 1, of mass , moves across a frictionless surface with speed . It collides elastically with block 2, of mass , which is at rest ( ). After the collision, block 1 moves with speed , while block 2 moves with speed . Assume that , so that after the collision, the two objects move off in the direction of the first object before the collision. Part A This collision is elastic. What quantities, if any, are conserved in this collision? You did not open hints for this part. ANSWER: Part B What is the final speed of block 1? m1 ui m2 vi = 0 uf vf m1 > m2 kinetic energy only momentum only kinetic energy and momentum uf Express in terms of , , and . You did not open hints for this part. ANSWER: Part C What is the final speed of block 2? Express in terms of , , and . You did not open hints for this part. ANSWER: Ballistic Pendulum In a ballistic pendulum an object of mass is fired with an initial speed at a pendulum bob. The bob has a mass , which is suspended by a rod of length and negligible mass. After the collision, the pendulum and object stick together and swing to a maximum angular displacement as shown . uf m1 m2 ui uf = vf vf m1 m2 ui vf = m v0 M L Part A Find an expression for , the initial speed of the fired object. Express your answer in terms of some or all of the variables , , , and and the acceleration due to gravity, . You did not open hints for this part. ANSWER: Part B An experiment is done to compare the initial speed of bullets fired from different handguns: a 9.0 and a .44 caliber. The guns are fired into a 10- pendulum bob of length . Assume that the 9.0- bullet has a mass of 6.0 and the .44-caliber bullet has a mass of 12 . If the 9.0- bullet causes the pendulum to swing to a maximum angular displacement of 4.3 and the .44-caliber bullet causes a displacement of 10.1 , find the ratio of the initial speed of the 9.0- bullet to the speed of the .44-caliber bullet, . Express your answer numerically. You did not open hints for this part. ANSWER: v0 m M L g v0 = mm kg L mm g g mm mm (v /( 0 )9.0 v0)44 Score Summary: Your score on this assignment is 0%. You received 0 out of a possible total of 0 points. (v0 )9.0/(v0 )44 =
Soci 2010 Writing Assignment #2 On Tuesday, October 13th, around 11:59 pm, guns rang out in North Nashville less than a block from Tennessee State University’s campus. This story is no longer unusual. Black Americans make up less than 13% of the population of the United States yet account for almost 50% of deaths by gun homicide. Please provide an explanation for why this is so. Is it an issue of “race”/ethnicity (Black culture or socialization)? Is the problem due to sex/gender (the majority of those homicides are male victims at the hands of male assailants)? Is the problem one unique to American culture (e.g., easy access to guns, violent entertainment) or socialization where we teach one another to solve our problems through aggression (e.g., violent television shows, violent government behavior, neighborhood conditions)? Below are links that provide support for some of these arguments: https://publichealthwatch.wordpress.com/2014/08/19/the-devastating-risk-of-gun-violence-for-black-children-in-america/ http://www.usnews.com/news/blogs/data-mine/2014/12/11/no-justice-is-not-colorblind http://www.pewsocialtrends.org/2013/05/07/gun-violence-in-america/st_13-05-02_ss_guncrimes_05_race/ http://www.theatlantic.com/magazine/archive/2014/06/the-case-for-reparations/361631/ Please follow the guidelines if you hope to earn more than a “C” on your writing assignment. Your paper should be no less than three pages, Times New Roman 12 point font, double spaced. Please use the rubric below as a guide in crafting a college-level paper. In addition, you must include five key terms or main ideas from Chapter 9 and/or 10 as well as use at least three outside sources or links (other than what I have provided) to support your argument. Please cite where I can find the terms, ideas or sources as you use them in your paper. Do not use the phrases “I think”, “I feel” or “In my opinion”. We are moving away from emotional arguments and moving toward fact-based arguments. Your paper is due on October 25th at 11:59 pm. Writing Voice Audience Organization Development, and Thesis/ central idea Sentences and Vocabulary Mechanics and Grammar Resources Write a unified, well-developed essay, consisting of introduction, body, and conclusion, with an arguable thesis and persuasive support Use a variety of rhetorical strategies, which may include argument, analysis, textual analysis, comparison/contrast, and causal analysis. Demonstrate a sophisticated awareness of audience using a consistent voice. Organize paragraphs into a logical sequence, developing the central idea of the essay to a logical conclusion. Employ a variety of sentence structures consistently, using college level diction. Proofread, and edit essays for public presentation so they exhibit no major syntactical errors in English grammar, usage, or punctuation. Find, read, analyze, interpret, use, synthesize and evaluate text book and any outside sources, including online information. Incorporate sources as appropriate. Use MLA or APA documentation format.
Sex, Gender, and Popular Culture Spring 2015 Look through popular magazines, and see if you can find advertisements that objectify women in order to sell a product. Alternately, you may use an advertisement on television (but make sure to provide a link to the ad so I can see it!). Study these images then write a paper about objectification that deals with all or some of the following: • What effect(s), if any, do you think the objectification of women’s bodies has on our culture? • Jean Kilbourne states “turning a human being into a thing is almost always the first step toward justifying violence against that person.” What do you think she means by this? Do you agree with her reasoning? Why or why not? • Some people would argue that depicting a woman’s body as an object is a form of art. What is your opinion of this point of view? Explain your reasoning. • Why do you think that women are objectified more often than men are? • How does sexualization and objectification play out differently across racial lines? • Kilbourne explains that the consequences of being objectified are different – and more serious – for women than for men. Do you agree? How is the world different for women than it is for men? How do objectified images of women interact with those in our culture differently from the way images of men do? Why is it important to look at images in the context of the culture? • What is the difference between sexual objectification and sexual subjectification? (Ros Gill ) • How do ads construct violent white masculinity and how does that vision of masculinity hurt both men and women? Throughout your written analysis, be sure to make clear and specific reference to the images you selected, and please submit these images with your paper. Make sure you engage with and reference to at least 4 of the following authors: Kilbourne, Bordo, Hunter & Soto, Rose, Durham, Gill, Katz, Schuchardt, Ono and Buescher. Guidelines: Keep your content focused on structural, systemic, institutional factors rather than the individual: BE ANALYTICAL NOT ANECDOTAL. Avoid using the first person or including personal stories/reactions. You must make sure to actively engage with your readings: these essays need to be informed and framed by the theoretical material you have been reading this semester. Keep within the 4-6 page limit; use 12-point font, double spacing and 1-inch margins. Use formal writing conventions (introduction/thesis statement, body, conclusion) and correct grammar. Resources may be cited within the text of your paper, i.e. (Walters, 2013).
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here is the video https://www.youtube.com/watch?v=760lwYmpXbc In his Prison Experiment, Professor Philip Zimbardo wanted to test the behavior of good people when they are put into evil places. In the short amount of time that his experiment ran, hid findings were shocking. The students who played the role of the guards became sadistic, and the students that who played the role of the prisoners became extremely stressed. McLaren explained to us that since the beginning of time, all humans have had an appetite for violence. McLaren also explains that in a world where violence is also a means of entertainment, it only adds to our appetite for violence. Think about how the information that McLaren shares and how it relates to the Stanford Prison Experiment. McLaren shares with us that name calling is the beginning stage of dehumanizing, and when one succeeds in name calling, we decide to extend our powers and become violent and uncaring. McLaren also uses many examples of the world’s history, specifically regarding religion and war. McLaren explains that the mentality of everyone that goes into war believes that their enemy deserves everything that they get. Compare McLaren’s findings with The Stanford Prison Experiment. Zimbardo concluded that his students (the good people) were defeated by the prison (the evil place). Can you think of a story or a situation where the good person overcame the evil place? Can one’s attitude and/or morality be so strong that it can allow you to overcome anything? The manner in which, the guard “John Wayne”, treated the prisoners was very controversial. Years later he admitted himself that he does regret his behavior, but could it be possible that he wasn’t acting? Is it true what prisoner 416 said? Can someone contribute to a role so much that it starts to show who you really are as a person? If we were put in the shoes of “John Wayne” would we have behaved the same? Are ethics totally thrown out the window when given that position of power?
Name: __________________________________ MIS 3000 Spring 2014 Excel Hands-On Exam #1 Complete all the items on the test. You must submit this sheet and your file to the Pilot Dropbox to receive a grade. Be sure to put your name on this sheet also. The total amount of points you can receive for this test is 50. In this exercise, you will use Excel to create a sample budget workbook that will contain information of your choice, using the Excel skills and features presented in Tutorials 1 through 4. Use the following steps as a guide to completing your workbook. Note: Please be sure not to include any persona l information of a sensitive nature in any workbooks you create to be submitted to your instructor for this exam 1. Gather the data related to your monthly cash inflows and outflows. For example, how much do you take home in your paychecks each month? What other sources of income do you have? What expenses do you have-rent, utilities, gas, insurance, groceries, entertainment, car payments, and so on? 2. Create a new workbook for the sample financial data. Use the first worksheet as a documentation sheet that includes your name, the date on which you start creating the workbook, and a brief description of the workbook’s purpose. (3 points) 3. Plan the structure of the second worksheet, which will contain the budget. Include a section to enter values that remain consistent from month to month, such as monthly income and expenses. As you develop the budget worksheet, reference these cells in formulas that require those values. Later, you can update any of these values and see the changes immediately reflected throughout the budget. (3 points) 4. In the budget worksheet, enter realistic monthly earnings for each month of the year. Use formulas to calculate the total earnings each month, the average monthly earnings, and the total earnings for the entire year. (3 Points) 5. In the budget worksheet, enter realistic personal expenses for each month. Divide the expenses into at least three categories, providing subtotals for each category and a grand total of all the monthly expenses. Calculate the average monthly expenses and total expenses for the year. (5 points) 6. Calculate the monthly net cash flow (the value of total income minus total expenses). (5 points) 7. Use the cash flow values to track the savings throughout the year. Use a realistic amount for savings at the beginning of the year. Use the monthly net cash flow values to add or subtract from this value. Project the end-of-year balance in the savings account under your proposed budget. (5 points) 8. Format the worksheet’s contents using appropriate text and number formats. Add colors and borders to make the content easier to read and interpret. Use cell styles and themes to provide your worksheet with a uniform appearance. (3 points) 9. Use conditional formatting to automatically highlight negative net cash flow months. (4 points) 10. Insert a pie chart that compares the monthly expenses for the categories. (5 points) 11. Insert a column chart that charts all of the monthly expenses regardless of the category. 12. Insert a line chart or Sparkline that shows the change in the savings balance throughout the 12 months of the year. (4 points) 13. Insert new rows at the top of the worksheet and enter titles that describe the worksheet’s contents. 14. Think of a major purchase you might want to make-for example, a car or a house. Determine the amount of the purchase and the current annual interest rate charged by your local bank. Provide a reasonable length of time to repay the loan, such as five years for a car loan or 20 to 30 years for a home loan. Use the PMT function to determine how much you would have to spend each month on the payments for your purchase. You can do these calculations in a separate worksheet. (5 points) 15. Add the loan information to your monthly budget and evaluate the purchase of this item on your budget. 16. Format the worksheets for your printer. Include headers and footers that display the workbook filename, the workbook’s author, and the date on which the report is printed. If the report extends across several pages, repeat appropriate print titles on all of the pages, and include page numbers and the total number of pages on every printed page. (DO NOT PRINT) (5 points) 17. Save and close the workbook.