1. (2 marks total) a. Multiply 109 x 309 b. Divide 1988 by 16 exactly 2. (4 marks total) a. Write 2/11 as a decimal to 2 decimal places b. Calculate 35% of 62 c. Add 103/4 to 92/3 d. Subtract 79.04 from 115.225 giving your answer correct to 2 decimal places 3. Circle the fractions in the list which are equivalent to 0.80 (2 marks) 2/7 32/40 8/10 8/20 8/25 9/24 36/45 40/50 4. Write the numerical value of: 3-3 (2 marks total) 5. Simplify z + 67 = 3z + 33 (1 mark total) 6. Solve to 1 decimal place 3y – 34 = 2y + 89 (1 mark total) 7. Solve the following equations to 2 decimal places (3 marks total) a. 37x + 1 = 35 b. 27 – a = 7.45 c. 3(y + 2) = 14 8. A 7-sided polygon is called a Heptagon. (3 marks total) a. What is the total of a Heptagon’s interior angles? b. If the Heptagon is regular (all angles the same), calculate the size of each interior angle to 2 decimal places. 9. Calculate the size of angle a and angle b. (2 mark total) 10. How many centilitres are there in 1.25 litres? (1 mark total) 11. The diagram below shows a stone carving with a hole on it; determine its volume (not including hole), if its thickness is 8 cm. Give your answer in cm3 to 2 decimal points. Assume π = 3.14 (6 marks total) 12. The diagram below shows a piece of alloy plate with a hole in it made from aluminium, copper and magnesium with a mass ratio of 35:3:2. Calculate the following to 2 decimal places. All measurements are in cm. (7 marks total) a. Using the formula A = 1/2(a+b)h calculate the height of the shape below. b. The volume of the solid part (not including the hole) of the shape below to 3 decimal places if it was 0.25cm thick. c. The mass of each material if the total mass of the plate is 62 kg. 10 cm Hole dia = 3 cm Cross sectional area of solid (not including hole) = 28.935 cm2 8 cm 13. A 66kg boy is running at 3 m/s. Calculate his Kinetic Energy using the formula KE = 1/2mv2 (2 marks total) 14. A rocket has a mass of 2,000 kg. What is its acceleration if the forces of its engines are 50kN? Show working out to receive full marks. (1 marks total) 250,000,000 m/s² 25 m/s² 25,000 m/s² 15. In the diagram below a force of 125N (F1) is applied to a lever 20cm (D1) away from the fulcrum, (4 marks total) Fulcrum (a) How far away in metres would a force of 5N (F2) need to be to balance the load? (b) How much force (F2) would need to be applied 0.7m away to balance the same load (F1)? 16. For the circuit shown in the diagram below, calculate: (3 mark total) a. The total circuit resistance. b. The value of the current I. c. Calculate the voltage of the battery cell if the current was 3amp and the resistors stayed the same. 17. In the diagram of a hydraulic system, the area of piston A is 8cm2 and the area of piston B is 48cm2. (2 mark total) If the Force IN is 16 N, calculate the force OUT. 18. Plot the graph 2y = x3 – 4 using a value range for x from 0 to 3 (3 marks total) 14 12 10 8 6 4 2 0 -2 Choosing appropriate scale (1 mark) Accurately plotting y values (1 mark) X 0 1 2 3 Y Accurately plotting line of best fit. (1 mark) SPARE PAPER

1. (2 marks total) a. Multiply 109 x 309 b. Divide 1988 by 16 exactly 2. (4 marks total) a. Write 2/11 as a decimal to 2 decimal places b. Calculate 35% of 62 c. Add 103/4 to 92/3 d. Subtract 79.04 from 115.225 giving your answer correct to 2 decimal places 3. Circle the fractions in the list which are equivalent to 0.80 (2 marks) 2/7 32/40 8/10 8/20 8/25 9/24 36/45 40/50 4. Write the numerical value of: 3-3 (2 marks total) 5. Simplify z + 67 = 3z + 33 (1 mark total) 6. Solve to 1 decimal place 3y – 34 = 2y + 89 (1 mark total) 7. Solve the following equations to 2 decimal places (3 marks total) a. 37x + 1 = 35 b. 27 – a = 7.45 c. 3(y + 2) = 14 8. A 7-sided polygon is called a Heptagon. (3 marks total) a. What is the total of a Heptagon’s interior angles? b. If the Heptagon is regular (all angles the same), calculate the size of each interior angle to 2 decimal places. 9. Calculate the size of angle a and angle b. (2 mark total) 10. How many centilitres are there in 1.25 litres? (1 mark total) 11. The diagram below shows a stone carving with a hole on it; determine its volume (not including hole), if its thickness is 8 cm. Give your answer in cm3 to 2 decimal points. Assume π = 3.14 (6 marks total) 12. The diagram below shows a piece of alloy plate with a hole in it made from aluminium, copper and magnesium with a mass ratio of 35:3:2. Calculate the following to 2 decimal places. All measurements are in cm. (7 marks total) a. Using the formula A = 1/2(a+b)h calculate the height of the shape below. b. The volume of the solid part (not including the hole) of the shape below to 3 decimal places if it was 0.25cm thick. c. The mass of each material if the total mass of the plate is 62 kg. 10 cm Hole dia = 3 cm Cross sectional area of solid (not including hole) = 28.935 cm2 8 cm 13. A 66kg boy is running at 3 m/s. Calculate his Kinetic Energy using the formula KE = 1/2mv2 (2 marks total) 14. A rocket has a mass of 2,000 kg. What is its acceleration if the forces of its engines are 50kN? Show working out to receive full marks. (1 marks total) 250,000,000 m/s² 25 m/s² 25,000 m/s² 15. In the diagram below a force of 125N (F1) is applied to a lever 20cm (D1) away from the fulcrum, (4 marks total) Fulcrum (a) How far away in metres would a force of 5N (F2) need to be to balance the load? (b) How much force (F2) would need to be applied 0.7m away to balance the same load (F1)? 16. For the circuit shown in the diagram below, calculate: (3 mark total) a. The total circuit resistance. b. The value of the current I. c. Calculate the voltage of the battery cell if the current was 3amp and the resistors stayed the same. 17. In the diagram of a hydraulic system, the area of piston A is 8cm2 and the area of piston B is 48cm2. (2 mark total) If the Force IN is 16 N, calculate the force OUT. 18. Plot the graph 2y = x3 – 4 using a value range for x from 0 to 3 (3 marks total) 14 12 10 8 6 4 2 0 -2 Choosing appropriate scale (1 mark) Accurately plotting y values (1 mark) X 0 1 2 3 Y Accurately plotting line of best fit. (1 mark) SPARE PAPER

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What is the prime purpose of selecting a composite material over material from the other family groups? MODULE 3 – STRUCTURE OF SOLID MATERIALS The ability of a material to exist in different space lattices is called a. Allotropic b. Crystalline c. Solvent d. Amorphous Amorphous metals develop their microstructure as a result of ___________. a. Dendrites b. Directional solidification c. Slip d. Extremely rapid cooling In an alloy, the material that dissolves the alloying element is the ___________. a. Solute b. Solvent c. Matrix d. Allotrope What is the coordination number (CN) for the fcc structure formed by ions of sodium and chlorine that is in the chemical compound NaCl (salt) ? a. 6 b. 8 c. 14 d. 16 What pressure is normally used in constructing a phase diagram? a. 100 psi b. Depends on material c. Ambient d. Normal atmospheric pressure What line on a binary diagram indicates the upper limit of the solid solution phase? a. Liquidus b. Eutectic c. Eutectoid d. Solidus What holds the atoms (ions) together in a compound such as NaCl are electrostatic forces between ___________. a. Atom and ion b. Covalent bonds c. Electrons and nuclei d. Neutrons Diffusion of atoms through a solid takes place by two main mechanisms. One is diffusion through vacancies in the atomic structure. Another method of diffusion is ___________. a. Cold b. APF c. Substitutional d. Interstitial Give a brief explanation of the Lever rule (P117) Grain boundaries ___________ movement of dislocations through a solid. a. Improve b. Inhibit c. Do not affect Iron can be alloyed with carbon because it is ___________. a. Crystalline b. Amorphous c. A mixture d. Allotropic Metals can be cooled only to crystalline solids. a. T (true) b. F (false) Sketch an fcc unit cell. Metals are classified as crystalline materials. Name one metal that is an amorphous solid and name at least one recent application in which its use is saving energy or providing greater strength and/or corrosion resistance. MODULE 4 – MECHANICAL PROPERTIES Give two examples of a mechanical property. a. Thermal resistance b. Wear resistance c. Hardness d. Strength Scissors used in the home cut material by concentrating forces that ultimately produce a certain type of stress within the material. Identify this stress. a. Bearing stress b. Shearing stress c. Compressive stress An aluminum rod 1 in. in diameter (E =10.4 x 106psi) experiences an elastic tensile strain of 0.0048 in./in. Calculate the stress in the rod. a. 49,920 ksi b. 49,920 psi c. 49,920 msi A 1-in.-diameter steel circular rod is subject to a tensile load that reduces its cross-sectional area to 0.64 in2. Express the rod’s ductility using a standard unit of measure. a. 18.5% b. 1.85% c. 18.5 d. (a) and (c) What term is used to describe the low-temperature creep of polymerics? a. Springback b. Creep rupture c. Cold flow d. Creep forming MODULE 7 – TESTING, FAILURE ANALYSIS, STANDARDS, & INSPECTION Factors of safety are defined either in terms of the ultimate strength of a material or its yield strength. In other words, by the use of a suitable factor, the ultimate or yield strength is reduced in size to what is known as the design stress or safe working stress. Which factor of safety would be more appropriate for a material that will be subjected to repetitious, suddenly applied loads? Product liability court cases have risen sharply in recent years because of poor procedures in selecting materials for particular applications. Assuming that a knowledge of a material’s properties is a valid step in the selection process, cite two examples where such lack of knowledge could or did lead to failure or unsatisfactory performance. Make a sketch and fully dimension an Izod impact test specimen. Which agency publishes the Annual Book of standard test methods used worldwide for evaluation of materials? a. NASA b. NIST c. ASTM d. SPE

What is the prime purpose of selecting a composite material over material from the other family groups? MODULE 3 – STRUCTURE OF SOLID MATERIALS The ability of a material to exist in different space lattices is called a. Allotropic b. Crystalline c. Solvent d. Amorphous Amorphous metals develop their microstructure as a result of ___________. a. Dendrites b. Directional solidification c. Slip d. Extremely rapid cooling In an alloy, the material that dissolves the alloying element is the ___________. a. Solute b. Solvent c. Matrix d. Allotrope What is the coordination number (CN) for the fcc structure formed by ions of sodium and chlorine that is in the chemical compound NaCl (salt) ? a. 6 b. 8 c. 14 d. 16 What pressure is normally used in constructing a phase diagram? a. 100 psi b. Depends on material c. Ambient d. Normal atmospheric pressure What line on a binary diagram indicates the upper limit of the solid solution phase? a. Liquidus b. Eutectic c. Eutectoid d. Solidus What holds the atoms (ions) together in a compound such as NaCl are electrostatic forces between ___________. a. Atom and ion b. Covalent bonds c. Electrons and nuclei d. Neutrons Diffusion of atoms through a solid takes place by two main mechanisms. One is diffusion through vacancies in the atomic structure. Another method of diffusion is ___________. a. Cold b. APF c. Substitutional d. Interstitial Give a brief explanation of the Lever rule (P117) Grain boundaries ___________ movement of dislocations through a solid. a. Improve b. Inhibit c. Do not affect Iron can be alloyed with carbon because it is ___________. a. Crystalline b. Amorphous c. A mixture d. Allotropic Metals can be cooled only to crystalline solids. a. T (true) b. F (false) Sketch an fcc unit cell. Metals are classified as crystalline materials. Name one metal that is an amorphous solid and name at least one recent application in which its use is saving energy or providing greater strength and/or corrosion resistance. MODULE 4 – MECHANICAL PROPERTIES Give two examples of a mechanical property. a. Thermal resistance b. Wear resistance c. Hardness d. Strength Scissors used in the home cut material by concentrating forces that ultimately produce a certain type of stress within the material. Identify this stress. a. Bearing stress b. Shearing stress c. Compressive stress An aluminum rod 1 in. in diameter (E =10.4 x 106psi) experiences an elastic tensile strain of 0.0048 in./in. Calculate the stress in the rod. a. 49,920 ksi b. 49,920 psi c. 49,920 msi A 1-in.-diameter steel circular rod is subject to a tensile load that reduces its cross-sectional area to 0.64 in2. Express the rod’s ductility using a standard unit of measure. a. 18.5% b. 1.85% c. 18.5 d. (a) and (c) What term is used to describe the low-temperature creep of polymerics? a. Springback b. Creep rupture c. Cold flow d. Creep forming MODULE 7 – TESTING, FAILURE ANALYSIS, STANDARDS, & INSPECTION Factors of safety are defined either in terms of the ultimate strength of a material or its yield strength. In other words, by the use of a suitable factor, the ultimate or yield strength is reduced in size to what is known as the design stress or safe working stress. Which factor of safety would be more appropriate for a material that will be subjected to repetitious, suddenly applied loads? Product liability court cases have risen sharply in recent years because of poor procedures in selecting materials for particular applications. Assuming that a knowledge of a material’s properties is a valid step in the selection process, cite two examples where such lack of knowledge could or did lead to failure or unsatisfactory performance. Make a sketch and fully dimension an Izod impact test specimen. Which agency publishes the Annual Book of standard test methods used worldwide for evaluation of materials? a. NASA b. NIST c. ASTM d. SPE

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NAME: ARTIFACT: Describe your artifact. Why do you think it would work well for this project? _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ ASSIGNMENT CRITERIA Please answer “yes” or “no” to the following questions. Is your artifact something that was made by people? ___yes ___no Is your artifact specific? (i.e., not a broad concept) ___yes ___no Can you point to your artifact? (i.e., not an abstract idea) ___yes ___no Does your artifact contain enough material to analyze? ___yes ___no Does your artifact relate to the course theme? ___yes ___no Did you bring your artifact to class today? ___yes ___no If you answered no, why not? _________________________________________ REVIEW Take a moment to quickly review the fundamental moves of analysis with your artifact. Do you notice patterns of frequency? ___yes ___no Do you notice patterns of contrast? ___yes ___no Do you notice anomalies? ___yes ___no Do you notice intensity or specific moments of intensity? ___yes ___no Record notes from this exercise in the space provided. What patterns, anomalies, and moments of intensity have you identified that you’d like to keep in mind moving forward? _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ WILL IT WORK? Talk over your responses with a partner before recording an answer to this question. If you or your partner answered “no” to half or more than half of these questions, you may want to reconsider the artifact you have chosen to analyze. Will your artifact work for this project? ___yes ___no FINAL STEPS If you have determined—yes—your artifact will work for this project, record any notes you’d like to save from this exercise in your class notebook and hand this checklist in to your instructor. If you have determined—no—your artifact will not work for this project, take a few minutes to brainstorm other potential artifacts that better fit the assignment criteria and lend themselves to analysis (at least 3). Record your ideas in the space provided and in your class notebook, and hand this checklist in to your instructor. _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ If you have determined—I don’t know—or if you’re not sure if your artifact will work for this project, take a few minutes to write down concerns and questions this exercised has raised. Record them in the space provided and in your class notebook, and hand this checklist in to your instructor. _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ That’s it, you’re done! Expect an email in response to this exercise before the next class period.

NAME: ARTIFACT: Describe your artifact. Why do you think it would work well for this project? _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ ASSIGNMENT CRITERIA Please answer “yes” or “no” to the following questions. Is your artifact something that was made by people? ___yes ___no Is your artifact specific? (i.e., not a broad concept) ___yes ___no Can you point to your artifact? (i.e., not an abstract idea) ___yes ___no Does your artifact contain enough material to analyze? ___yes ___no Does your artifact relate to the course theme? ___yes ___no Did you bring your artifact to class today? ___yes ___no If you answered no, why not? _________________________________________ REVIEW Take a moment to quickly review the fundamental moves of analysis with your artifact. Do you notice patterns of frequency? ___yes ___no Do you notice patterns of contrast? ___yes ___no Do you notice anomalies? ___yes ___no Do you notice intensity or specific moments of intensity? ___yes ___no Record notes from this exercise in the space provided. What patterns, anomalies, and moments of intensity have you identified that you’d like to keep in mind moving forward? _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ WILL IT WORK? Talk over your responses with a partner before recording an answer to this question. If you or your partner answered “no” to half or more than half of these questions, you may want to reconsider the artifact you have chosen to analyze. Will your artifact work for this project? ___yes ___no FINAL STEPS If you have determined—yes—your artifact will work for this project, record any notes you’d like to save from this exercise in your class notebook and hand this checklist in to your instructor. If you have determined—no—your artifact will not work for this project, take a few minutes to brainstorm other potential artifacts that better fit the assignment criteria and lend themselves to analysis (at least 3). Record your ideas in the space provided and in your class notebook, and hand this checklist in to your instructor. _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ If you have determined—I don’t know—or if you’re not sure if your artifact will work for this project, take a few minutes to write down concerns and questions this exercised has raised. Record them in the space provided and in your class notebook, and hand this checklist in to your instructor. _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ That’s it, you’re done! Expect an email in response to this exercise before the next class period.

COMM 1311: Written Communication Assignment 5 Argumentation Essay (Chapter 10, pp. 218-232, Arlov) Purpose of Assignment • The purpose of this assignment is to enable the student to write an essay with a compelling argumentation that shows critical thinking. A persuasive essay is a writer’s attempt to convince readers of the validity of a particular opinion on a controversial issue. Objectives • The student will be able to correctly structure an essay and bring forward a compelling thesis and argument. • The student will understand the creativity of the writing process and use his own ideas. • The student will be able to craft a compelling essay and show critical thinking. • The student will show that he is able to argue both sides of a topic and is willing to acknowledge a different opinion. Instructions 1. Establish a subject Choose a topic that interests you. An argument does not have to be a burning issue, but it must be a debatable topic. It can be anything you feel strongly about but it has to be approved by the instructor. 2. Present a clear thesis and identify the controversy Your thesis should inform readers of your purpose and how you will proceed in your argumentation. 3. Follow an organizational pattern and provide support The body paragraphs of the essay should provide specific support. These supports may include personal experience, statistics, facts, or experts’ opinions. They may be garnered from scientific journals, magazines, books, newspapers, textbooks, studies, or interviews. Select only the facts that are relevant. 4. Consider differing opinions A persuasive essay may be strengthened by acknowledging conflict viewpoints and discussing them. 4. Draw a conclusion Restate your position in different words from the introduction. Do not introduce new material in the conclusion. You may want to conclude by encouraging some specific call to action. Requirements The essay topic must meet the approval of the instructor: • Have a complete cover page • have at least 500 words • use full sentences (and no bullet points) • must have page numbers • must have a reference page Example writing (not a complete essay): Boxing: Countdown to Injury A left hook smashes into the fighter’s jaw. A following right slams his head the opposite direction. An uppercut to the jaw snaps his head back, momentarily stopping the blood flow to his brain. The boxer drops, hitting the mat with a thud. His brain bounces off his skull for the second time in a matter of seconds. Is this what we should call a sport? Because of injuries, neurological damage, and ring deaths, the rules of professional boxing should be changed. Boxing has always been a brutal sport. The ancient Greeks used gloves studded with metal spikes, which slashed the face and body and split skulls. Although gloves are no longer spiked, boxers today sustain injuries ranging from cuts and bruises to broken bones. It is not uncommon to see a boxer leave the ring with a cut on his face, an eye swollen shut, and a nose enlarged and bloody. Often, healing in is incomplete because these areas receive the same blows again and again in other matches. In fact, repeated blows almost cost Sugar Ray Leonard his sight when his retina detached in his left eye. Besides superficial injuries, boxers suffer short-term neurological damage as a result of staggering blows to the head. A knockout punch, for example, is often delivered with such force that the brain smashes against the skull, tearing nerve fibers and blood vessels, resulting in a concussion. Even a blow to the neck can close the carotid artery, the main artery to the brain, whereby oxygen and blood to the brain are disrupted, resulting in dizziness and confusion. Later, the boxers often have no memory of the moments before or after a knockout blow. Submission Criteria Due Date: Sunday, December 6, 2015. Late assignments will receive an automatic ZERO grade. Where to deliver hard copies: In class Assessment Criteria CRITERIA Assessment Rubric Argumentation Essay SCORES Introduction Introduces the issue and its importance, says what your essay will cover 2 Organization The sound structure of the essay 1 Expression Sentences, phrases, metaphors, verbs etc. The strength of the language used 4 Conclusion Restate the issue, summarizes the strength of the arguments in the essays, gives your opinion about which essay is the strongest with supporting reasons 1 Mechanics Followed guidelines, professional format, punctuation, spelling, and capitalization are correct, use of headings, no bullet points 2 TOTAL 10% Plagiarism, copying from the internet or any other sources without citation will result in an automatic ZERO grade and a procedure of Academic Misconduct will filed against you. The complete essay has to be created and written by you alone. Prior assignments CAN NOT be used.

COMM 1311: Written Communication Assignment 5 Argumentation Essay (Chapter 10, pp. 218-232, Arlov) Purpose of Assignment • The purpose of this assignment is to enable the student to write an essay with a compelling argumentation that shows critical thinking. A persuasive essay is a writer’s attempt to convince readers of the validity of a particular opinion on a controversial issue. Objectives • The student will be able to correctly structure an essay and bring forward a compelling thesis and argument. • The student will understand the creativity of the writing process and use his own ideas. • The student will be able to craft a compelling essay and show critical thinking. • The student will show that he is able to argue both sides of a topic and is willing to acknowledge a different opinion. Instructions 1. Establish a subject Choose a topic that interests you. An argument does not have to be a burning issue, but it must be a debatable topic. It can be anything you feel strongly about but it has to be approved by the instructor. 2. Present a clear thesis and identify the controversy Your thesis should inform readers of your purpose and how you will proceed in your argumentation. 3. Follow an organizational pattern and provide support The body paragraphs of the essay should provide specific support. These supports may include personal experience, statistics, facts, or experts’ opinions. They may be garnered from scientific journals, magazines, books, newspapers, textbooks, studies, or interviews. Select only the facts that are relevant. 4. Consider differing opinions A persuasive essay may be strengthened by acknowledging conflict viewpoints and discussing them. 4. Draw a conclusion Restate your position in different words from the introduction. Do not introduce new material in the conclusion. You may want to conclude by encouraging some specific call to action. Requirements The essay topic must meet the approval of the instructor: • Have a complete cover page • have at least 500 words • use full sentences (and no bullet points) • must have page numbers • must have a reference page Example writing (not a complete essay): Boxing: Countdown to Injury A left hook smashes into the fighter’s jaw. A following right slams his head the opposite direction. An uppercut to the jaw snaps his head back, momentarily stopping the blood flow to his brain. The boxer drops, hitting the mat with a thud. His brain bounces off his skull for the second time in a matter of seconds. Is this what we should call a sport? Because of injuries, neurological damage, and ring deaths, the rules of professional boxing should be changed. Boxing has always been a brutal sport. The ancient Greeks used gloves studded with metal spikes, which slashed the face and body and split skulls. Although gloves are no longer spiked, boxers today sustain injuries ranging from cuts and bruises to broken bones. It is not uncommon to see a boxer leave the ring with a cut on his face, an eye swollen shut, and a nose enlarged and bloody. Often, healing in is incomplete because these areas receive the same blows again and again in other matches. In fact, repeated blows almost cost Sugar Ray Leonard his sight when his retina detached in his left eye. Besides superficial injuries, boxers suffer short-term neurological damage as a result of staggering blows to the head. A knockout punch, for example, is often delivered with such force that the brain smashes against the skull, tearing nerve fibers and blood vessels, resulting in a concussion. Even a blow to the neck can close the carotid artery, the main artery to the brain, whereby oxygen and blood to the brain are disrupted, resulting in dizziness and confusion. Later, the boxers often have no memory of the moments before or after a knockout blow. Submission Criteria Due Date: Sunday, December 6, 2015. Late assignments will receive an automatic ZERO grade. Where to deliver hard copies: In class Assessment Criteria CRITERIA Assessment Rubric Argumentation Essay SCORES Introduction Introduces the issue and its importance, says what your essay will cover 2 Organization The sound structure of the essay 1 Expression Sentences, phrases, metaphors, verbs etc. The strength of the language used 4 Conclusion Restate the issue, summarizes the strength of the arguments in the essays, gives your opinion about which essay is the strongest with supporting reasons 1 Mechanics Followed guidelines, professional format, punctuation, spelling, and capitalization are correct, use of headings, no bullet points 2 TOTAL 10% Plagiarism, copying from the internet or any other sources without citation will result in an automatic ZERO grade and a procedure of Academic Misconduct will filed against you. The complete essay has to be created and written by you alone. Prior assignments CAN NOT be used.

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Enterprise resource planning software for a manufacturing company will typically process data from _______________. sales orders and inventory sales, inventory, shipping, and invoicing, as well as from forecasts for raw material and human resources accounts receivable and payable none of the choices are correct.

Enterprise resource planning software for a manufacturing company will typically process data from _______________. sales orders and inventory sales, inventory, shipping, and invoicing, as well as from forecasts for raw material and human resources accounts receivable and payable none of the choices are correct.

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Watch this video and answer the multi choices: https://www.youtube.com/watch?v=D4lB4SowAQA PART 1 _______1. Sociologists obtained their knowledge of human behavior through _______, which is this process of systematically collecting information for the purpose of testing an existing theory or generating a new one. a. Common sense ideas b. Research c. Myths d. scientific laws _______2. With ____Research, the goal is scientific objectivity, and the focus is on data that can be measured numerically a. qualitative b. observational c. c. quantitative d. d. explanatory _______3. With _______research, interpretative description (words) rather than statistics (numbers) are used to analyze underlying meaning and patterns of social relationships. a. qualitative b. observational c. quantitative d. explanatory _______4. Researchers in one study systematically analyzed the contents of the notes of suicide victims to determine recurring themes, such as feeling of despair or failure. They hoped to determine if any patterns could be found that would help in understating why people might kill themselves. This is an example of __________. a. Qualitative research b. Explanatory research c. Quantitative research d. Descriptive research ______5. the first step in the research process is to: a. select and define the research problem b. review previous research. c. develop a research design d. formulate the hypothesis ______6. A_____sample is a selection from a larger population and has the essential characteristics of the total population. a. selective b. random c. representative d. longitudinal _______7. _________is the extent to which a study or research instrument accurately measures what it is supposed to measure;_________is the extent to which a study or research instrument yields consistent results. a. Validity; replication b. Replication; validity c. Validity; reliability d. Reliability; validity _______8. Researchers who use existing material and analyze data that originally was collected by others are engaged in: a. unethical conduct b. primary analysis. c. secondary analysis d. survey analysis _______9. In an experiment, the subjects in the control group a. are exposed to the independent variable. b. are not exposed to the independent variable. c. are exposed to the dependent variable. d. are not exposed to the dependent variable. _______10. A tentative statement that predicts the relationship between variable is called a. a hypothesis b. a research model. c. a probability sample. d. a generalization. ______11. John wants to test this idea: “people who attend church regularly are less likely to express prejudice toward other races than people who do not attend church regularly.’ This idea is John’s a. hypothesis. b. research model. c. conclusion. d. operational definition _______12. In a research project, which of the following steps would come after the other three? a. choosing a research design b. reviewing the literature c. formulating a hypothesis d. collecting the data ________13. The variable hypothesized to cause or influence another is called the a. dependent variable. b. hypothetical variable c. correlation variable d. independent variable ________14. An explanation of an abstract concept that is specific enough to allow a research to measure the concept is a a. Hypothesis b. correlation. c. operatonal definition. d. variable _____15. Observation, ethnography, and case studies are examples of: a. survey research b. experiments. c. Secondary analysis of existing data. d. Field research. ______16. Theory and research are interrelated because a. theory always precedes research. b. research always precedes theory c. both put limits on each other. d. they are parts of a constant cycle. ______17. A dependent variable is one that a. always occurs first. b. is influenced by another variable. c. Causes another variable to change. d. is the most important ______18. In a study designed to test the relationship between gender and voting behavior, the independent variable would be a. the age of the candidates b. voting behavior. c. The political party of the candidates. d. Gender ______19. Differences in age, sex, race, and social class are treated as ____________in sociological research. a. variables b. references c. causes d. controls ______20. Researchers in agriculture decided to test the effects of a new fertilizer on crop growth. In this study, crop growth is the a. independent variable b. dependent variable c. control variable d. correlation e. _____21. The ______is appropriate for studying the relationships among variables under carefully controlled conditions. a. experiment b. survey c. observational study d. in-depth study _____22. In every experiment, some subjects are exposed to an independent variable, and are then watched closely for their reactions. These subjects are known as the a. reference group b. experimental group c. control group d. survey group. ______23. A usual research method for learning the attitudes of a population would be a. an experiment. b. A survey. c. An observational study. d. Content analysis ______24. In survey research, the total group of people the researcher is interested in is called a. the population b. the sample, c. the control group d. the random sample ______25. In the experiment method, the subjects who are exposed to all the experimental conditions except the independent variable are referred to as the_________________group. a. peer b. alternate c. control d. experimental ______26. A__________Sample is one in which every member of the population in The population has an equal chance of being selected. a. defined b. random c. purposive d. convenience ______27. A sociologist is following the research model outlined in the text. After reviewing the literature, the next step will be to a. find a suitable subject b. formulate a hypothesis c. collect the data. d. Choose a research design. ______28. Sociologists use two approaches when answering important questions. a. Explanatory and descriptive Approaches b. Direct and systematic Approaches c. Normative and systematic Approaches d. Normative and Empirical Approaches ______29. Sociologists use types of empirical studies a. Research and Theoretical Studies b. Descriptive and Explanatory Studies c. Hypothesis and Correlations Studies d. Longitudinal and Cross-sectional Studies ______30. The deductive approach begin with the a. Collecting data b. Theory and uses research to test the theory. c. Hypothesis d. Observation ______31. The inductive approach begin with a a. Theory b. Data Collection c. Reviewing the Literature d. The Problem State ______32. Quantitative Research deals with a. Words b. Numbers c. Interpretive descriptive d. Use number to analyze underlying meanings and patterns of social relationships. ______33. ________is the study of social life in its natural setting: observing and interviewing people where they live, work, and play. a. The survey b. Secondary analysis c. Field research d. The experiment ______34. ________refers to the process of collecting data while being part of the activities of the group that the researcher is studying a. The experiment b. Survey research c. Participant observation d. Secondary analysis _______35. A/an________is a detailed study of the life and activities of a group of people by researchers who may live with that group over a period of years. a. Correlational study b. ethnography c. experiment d. content analysis _______36. A/an _________is a carefully designed situation in which the researcher studies the impact of certain variables on subjects’ attitudes or behavior. a. case study b. correlational study c. experiment d. Participant observation _______37. In an experiment, the_______contains the subjects who are exposed to an independent variable to study its effect on them. a. Experiment group b. Dependent group c. Control group d. Independent group _______38. In an experiment, the_________contains the subjects who are not exposed to the independent variable. a. Experimental group b. Independent group c. Dependent group d. Control group _______39. ________is the extent to which a study or research instrument accurately measures what it is supposed to measure a. Validity b. Reliability c. Predictability d. Variability ______40. ________is the extent to which a study or research instrument yields consistent results when applied to different individual at one time or to same individuals over time. a. Validity b. Reliability c. Predictability d. Variability TRUE/FALSE ______41. In social science research, individuals are the most typical units of analysis. ______42. With qualitative research, statistics are used to analyze patterns of social relationship. ______43. Reliability is when a study gives consistent results to different research over time.

Watch this video and answer the multi choices: https://www.youtube.com/watch?v=D4lB4SowAQA PART 1 _______1. Sociologists obtained their knowledge of human behavior through _______, which is this process of systematically collecting information for the purpose of testing an existing theory or generating a new one. a. Common sense ideas b. Research c. Myths d. scientific laws _______2. With ____Research, the goal is scientific objectivity, and the focus is on data that can be measured numerically a. qualitative b. observational c. c. quantitative d. d. explanatory _______3. With _______research, interpretative description (words) rather than statistics (numbers) are used to analyze underlying meaning and patterns of social relationships. a. qualitative b. observational c. quantitative d. explanatory _______4. Researchers in one study systematically analyzed the contents of the notes of suicide victims to determine recurring themes, such as feeling of despair or failure. They hoped to determine if any patterns could be found that would help in understating why people might kill themselves. This is an example of __________. a. Qualitative research b. Explanatory research c. Quantitative research d. Descriptive research ______5. the first step in the research process is to: a. select and define the research problem b. review previous research. c. develop a research design d. formulate the hypothesis ______6. A_____sample is a selection from a larger population and has the essential characteristics of the total population. a. selective b. random c. representative d. longitudinal _______7. _________is the extent to which a study or research instrument accurately measures what it is supposed to measure;_________is the extent to which a study or research instrument yields consistent results. a. Validity; replication b. Replication; validity c. Validity; reliability d. Reliability; validity _______8. Researchers who use existing material and analyze data that originally was collected by others are engaged in: a. unethical conduct b. primary analysis. c. secondary analysis d. survey analysis _______9. In an experiment, the subjects in the control group a. are exposed to the independent variable. b. are not exposed to the independent variable. c. are exposed to the dependent variable. d. are not exposed to the dependent variable. _______10. A tentative statement that predicts the relationship between variable is called a. a hypothesis b. a research model. c. a probability sample. d. a generalization. ______11. John wants to test this idea: “people who attend church regularly are less likely to express prejudice toward other races than people who do not attend church regularly.’ This idea is John’s a. hypothesis. b. research model. c. conclusion. d. operational definition _______12. In a research project, which of the following steps would come after the other three? a. choosing a research design b. reviewing the literature c. formulating a hypothesis d. collecting the data ________13. The variable hypothesized to cause or influence another is called the a. dependent variable. b. hypothetical variable c. correlation variable d. independent variable ________14. An explanation of an abstract concept that is specific enough to allow a research to measure the concept is a a. Hypothesis b. correlation. c. operatonal definition. d. variable _____15. Observation, ethnography, and case studies are examples of: a. survey research b. experiments. c. Secondary analysis of existing data. d. Field research. ______16. Theory and research are interrelated because a. theory always precedes research. b. research always precedes theory c. both put limits on each other. d. they are parts of a constant cycle. ______17. A dependent variable is one that a. always occurs first. b. is influenced by another variable. c. Causes another variable to change. d. is the most important ______18. In a study designed to test the relationship between gender and voting behavior, the independent variable would be a. the age of the candidates b. voting behavior. c. The political party of the candidates. d. Gender ______19. Differences in age, sex, race, and social class are treated as ____________in sociological research. a. variables b. references c. causes d. controls ______20. Researchers in agriculture decided to test the effects of a new fertilizer on crop growth. In this study, crop growth is the a. independent variable b. dependent variable c. control variable d. correlation e. _____21. The ______is appropriate for studying the relationships among variables under carefully controlled conditions. a. experiment b. survey c. observational study d. in-depth study _____22. In every experiment, some subjects are exposed to an independent variable, and are then watched closely for their reactions. These subjects are known as the a. reference group b. experimental group c. control group d. survey group. ______23. A usual research method for learning the attitudes of a population would be a. an experiment. b. A survey. c. An observational study. d. Content analysis ______24. In survey research, the total group of people the researcher is interested in is called a. the population b. the sample, c. the control group d. the random sample ______25. In the experiment method, the subjects who are exposed to all the experimental conditions except the independent variable are referred to as the_________________group. a. peer b. alternate c. control d. experimental ______26. A__________Sample is one in which every member of the population in The population has an equal chance of being selected. a. defined b. random c. purposive d. convenience ______27. A sociologist is following the research model outlined in the text. After reviewing the literature, the next step will be to a. find a suitable subject b. formulate a hypothesis c. collect the data. d. Choose a research design. ______28. Sociologists use two approaches when answering important questions. a. Explanatory and descriptive Approaches b. Direct and systematic Approaches c. Normative and systematic Approaches d. Normative and Empirical Approaches ______29. Sociologists use types of empirical studies a. Research and Theoretical Studies b. Descriptive and Explanatory Studies c. Hypothesis and Correlations Studies d. Longitudinal and Cross-sectional Studies ______30. The deductive approach begin with the a. Collecting data b. Theory and uses research to test the theory. c. Hypothesis d. Observation ______31. The inductive approach begin with a a. Theory b. Data Collection c. Reviewing the Literature d. The Problem State ______32. Quantitative Research deals with a. Words b. Numbers c. Interpretive descriptive d. Use number to analyze underlying meanings and patterns of social relationships. ______33. ________is the study of social life in its natural setting: observing and interviewing people where they live, work, and play. a. The survey b. Secondary analysis c. Field research d. The experiment ______34. ________refers to the process of collecting data while being part of the activities of the group that the researcher is studying a. The experiment b. Survey research c. Participant observation d. Secondary analysis _______35. A/an________is a detailed study of the life and activities of a group of people by researchers who may live with that group over a period of years. a. Correlational study b. ethnography c. experiment d. content analysis _______36. A/an _________is a carefully designed situation in which the researcher studies the impact of certain variables on subjects’ attitudes or behavior. a. case study b. correlational study c. experiment d. Participant observation _______37. In an experiment, the_______contains the subjects who are exposed to an independent variable to study its effect on them. a. Experiment group b. Dependent group c. Control group d. Independent group _______38. In an experiment, the_________contains the subjects who are not exposed to the independent variable. a. Experimental group b. Independent group c. Dependent group d. Control group _______39. ________is the extent to which a study or research instrument accurately measures what it is supposed to measure a. Validity b. Reliability c. Predictability d. Variability ______40. ________is the extent to which a study or research instrument yields consistent results when applied to different individual at one time or to same individuals over time. a. Validity b. Reliability c. Predictability d. Variability TRUE/FALSE ______41. In social science research, individuals are the most typical units of analysis. ______42. With qualitative research, statistics are used to analyze patterns of social relationship. ______43. Reliability is when a study gives consistent results to different research over time.

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Materials and process selection for a bicycle frame Background The principle components of the bike are familiar and their function needs no explanation. The largest of these is the frame. Frames can be made from a remarkable diversity of materials: CFRP, carbon steel, GFRP, nylon, wood, aluminium, titanium etc… How is it that such a diversity of materials can co-exist in a free market in which competition favours the fittest – sure there must be a single “best” material for the job? The mistake here is to assume that all bikes have the same purpose. The specification of a “shopping” or “uni” bike is very different from that of one for speed or for the mountain, as are the objectives of the purchaser. The Project Explore materials and process selection for bike frames (illustrated below) or for any other component of the bike: forks, handle bars, cranks, wheels, brake or gear cables…. 1) Analyse your chosen component, listing its function, the constraints it must meet and the objectives for the bike – This will require a decision about the type of bike you are designing (shopping (booze cruiser), speed / road / track bike, mountain bike, folding, children’s etc). Remember to include a lower cut-off constraint on fracture toughness (K1C > 15MPa √m is a good approximation to start at) – a brittle bike would be a bad idea! 2) List the requirements as Functions, Constraints, Objectives and Free Variables. 3) Identify the materials indices you will use to rank / select your materials. 4) Identify a promising material for the component. 5) Make a choice of material and then use CES EduPack Joining database to select ways of joining the frame. 6) Present the case study for your choice of material and process as a report. Use the charts from CES EduPack and other sources to explain your reasoning. For the purposes of simplicity it is suggested that you avoid accounting for shape in your selection criteria / indices identification. However, you should still consider the form of your component when considering an appropriate manufacturing process. To make the right choices you will need to source some information on typical service conditions for you selected bike type, these might be mechanical, physical or environmental focussed properties. You will also need to consider the type of conditions experienced by the component e.g. bending, tension, torsion, abrasion etc. Assignments will be assessed on the basis of the quality and clarity of the problem construction, the selection of indices, appropriate use of charts / figures and crucially the analysis and interpretation of the results presented.

Materials and process selection for a bicycle frame Background The principle components of the bike are familiar and their function needs no explanation. The largest of these is the frame. Frames can be made from a remarkable diversity of materials: CFRP, carbon steel, GFRP, nylon, wood, aluminium, titanium etc… How is it that such a diversity of materials can co-exist in a free market in which competition favours the fittest – sure there must be a single “best” material for the job? The mistake here is to assume that all bikes have the same purpose. The specification of a “shopping” or “uni” bike is very different from that of one for speed or for the mountain, as are the objectives of the purchaser. The Project Explore materials and process selection for bike frames (illustrated below) or for any other component of the bike: forks, handle bars, cranks, wheels, brake or gear cables…. 1) Analyse your chosen component, listing its function, the constraints it must meet and the objectives for the bike – This will require a decision about the type of bike you are designing (shopping (booze cruiser), speed / road / track bike, mountain bike, folding, children’s etc). Remember to include a lower cut-off constraint on fracture toughness (K1C > 15MPa √m is a good approximation to start at) – a brittle bike would be a bad idea! 2) List the requirements as Functions, Constraints, Objectives and Free Variables. 3) Identify the materials indices you will use to rank / select your materials. 4) Identify a promising material for the component. 5) Make a choice of material and then use CES EduPack Joining database to select ways of joining the frame. 6) Present the case study for your choice of material and process as a report. Use the charts from CES EduPack and other sources to explain your reasoning. For the purposes of simplicity it is suggested that you avoid accounting for shape in your selection criteria / indices identification. However, you should still consider the form of your component when considering an appropriate manufacturing process. To make the right choices you will need to source some information on typical service conditions for you selected bike type, these might be mechanical, physical or environmental focussed properties. You will also need to consider the type of conditions experienced by the component e.g. bending, tension, torsion, abrasion etc. Assignments will be assessed on the basis of the quality and clarity of the problem construction, the selection of indices, appropriate use of charts / figures and crucially the analysis and interpretation of the results presented.

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Nature and Culture Prof. David Backes Catalog of Personal Property Our possessions have symbolic meaning, both in a personal sense and in a cultural sense. A good way to reflect on the meaning of ownership, and of our own consumption patterns, is to make a list of everything we own. And that is what you will do for this assignment. I want you to spend a few hours taking an inventory of your possessions, and making a reasonably detailed list of what you own. (If you own several dozen books, for example, write that down. But you don’t need to give an exact count, or list the titles and authors. ) Once you’ve made the list, I want you to look it over carefully, think about it, and type a page or two about the meaning of possessions in your life, now and in the future. Most of you are young enough that you don’t have too many possessions yet, but here are some questions I’d like you to think about and that may help you decide what to write about in your brief essay. • Do you think that your life would be happier if you had more money? Why? What income do you think you will need to fulfill your dreams? • Do you use student loans or credit cards to pay for things you want but don’t need? Do you worry about your ability to repay the amount you’ve borrowed? What does this say about the role of material possessions in your life? • Have you ever thought about how the things you buy and the things you do have an impact on the environment and also on the world’s poorest people? Do you think awareness of this will affect how you choose to live? Why? • To raise a similar point, but in a different way: when you are making buying decisions, do you consider whether the items are environmentally or socially friendly? Why? • Do you often feel rushed, with too much to do and not enough time to do it? How does your answer compare with your ideas about the amount of money you need to fulfill your dreams? • What’s more important to you? A high-paying job, or a job that is truly fulfilling? How does your answer compare with your ideas about the amount of money you need to fulfill your dreams? “We Americans are great on fillers, as if what we have, what we are, is not enough. We have a cultural tendency toward denial, but, being affluent, we strangle ourselves with what we can buy. We have only to look at the houses we build to see how we build against space, the way we drink against pain and loneliness. We fill up space as if it were a pie shell, with things whose opacity further obstructs our ability to see what is already there.” — Gretel Ehrlich —

Nature and Culture Prof. David Backes Catalog of Personal Property Our possessions have symbolic meaning, both in a personal sense and in a cultural sense. A good way to reflect on the meaning of ownership, and of our own consumption patterns, is to make a list of everything we own. And that is what you will do for this assignment. I want you to spend a few hours taking an inventory of your possessions, and making a reasonably detailed list of what you own. (If you own several dozen books, for example, write that down. But you don’t need to give an exact count, or list the titles and authors. ) Once you’ve made the list, I want you to look it over carefully, think about it, and type a page or two about the meaning of possessions in your life, now and in the future. Most of you are young enough that you don’t have too many possessions yet, but here are some questions I’d like you to think about and that may help you decide what to write about in your brief essay. • Do you think that your life would be happier if you had more money? Why? What income do you think you will need to fulfill your dreams? • Do you use student loans or credit cards to pay for things you want but don’t need? Do you worry about your ability to repay the amount you’ve borrowed? What does this say about the role of material possessions in your life? • Have you ever thought about how the things you buy and the things you do have an impact on the environment and also on the world’s poorest people? Do you think awareness of this will affect how you choose to live? Why? • To raise a similar point, but in a different way: when you are making buying decisions, do you consider whether the items are environmentally or socially friendly? Why? • Do you often feel rushed, with too much to do and not enough time to do it? How does your answer compare with your ideas about the amount of money you need to fulfill your dreams? • What’s more important to you? A high-paying job, or a job that is truly fulfilling? How does your answer compare with your ideas about the amount of money you need to fulfill your dreams? “We Americans are great on fillers, as if what we have, what we are, is not enough. We have a cultural tendency toward denial, but, being affluent, we strangle ourselves with what we can buy. We have only to look at the houses we build to see how we build against space, the way we drink against pain and loneliness. We fill up space as if it were a pie shell, with things whose opacity further obstructs our ability to see what is already there.” — Gretel Ehrlich —

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xposure Evaluation – Single substance, different exposure time, different concentrations: 3- A person is working in a factory producing. This person is exposure to different concentrations of Toluene with different exposures time. The results of a personal sampling in an 8-hour shift is shown here: Exposure Time Concentration 3 hr. 35 min 790 mg/m^3 43 min 27 ppm 3.70 hr. 800 mg/m^3 What is this worker’s time weighted average of exposure in mg/m^3? Is the company in compliance with the OSHA requirement? 6- Phenyl ether can be used in soap factories as fragrance. A worker is exposed to this material during 9-hour shift and the exposure information is given in the following table: Exposure Time Concentration 1 hr. 45 min 4×〖10〗^(-6 ) mg/〖cm〗^3 2 hr. 5 min 7×〖10〗^(-6 ) mg/〖cm〗^3 65 min 3×〖10〗^(-3 ) mg/L Remaining Time 7.5 mg/m^3 What is this worker’s time weighted average of exposure in mg/m^3? Is the company in compliance with the OSHA requirement? 7- One of the major ingredients of insect repellents is Naphthalene. Consider a situation in which a worker is exposed to this material. The exposure time and concentration is given in a table below: Exposure Time Concentration 275 min 12 ppm 40 min 5 ppm 165 min 10 ppm What is this worker’s time weighted average of exposure? Is the condition hazardous? Exposure Evaluation – Multiple substance, equal exposure time, constant concentrations: 1- A person is exposed to the vapors of Benzene and Ethyl alcohol. Tests show that the concentration of Benzene is 1 ppm and Ethyl alcohol is 450 ppm. What is the threshold limit value of the mix? Is this person at risk? 6- Several workers at a rubber and leather manufacturing company are exposed to vapors of Vinyl chloride, Toluene and Xylene with concentration of 0.2 ppm, 135 ppm 200 mg/m^3 respectively. What is the threshold limit value of the mix? Are the employees at risk? 7- Several workers exposed to vapors of Ammonia, Arsine, Chloroform and Acetone with concentration of 12 ppm, 0.04 mg/m^3, 15 ppm, and 570 mg/m^3 respectively. What is the threshold limit value of the mix? Are the employees at risk?

xposure Evaluation – Single substance, different exposure time, different concentrations: 3- A person is working in a factory producing. This person is exposure to different concentrations of Toluene with different exposures time. The results of a personal sampling in an 8-hour shift is shown here: Exposure Time Concentration 3 hr. 35 min 790 mg/m^3 43 min 27 ppm 3.70 hr. 800 mg/m^3 What is this worker’s time weighted average of exposure in mg/m^3? Is the company in compliance with the OSHA requirement? 6- Phenyl ether can be used in soap factories as fragrance. A worker is exposed to this material during 9-hour shift and the exposure information is given in the following table: Exposure Time Concentration 1 hr. 45 min 4×〖10〗^(-6 ) mg/〖cm〗^3 2 hr. 5 min 7×〖10〗^(-6 ) mg/〖cm〗^3 65 min 3×〖10〗^(-3 ) mg/L Remaining Time 7.5 mg/m^3 What is this worker’s time weighted average of exposure in mg/m^3? Is the company in compliance with the OSHA requirement? 7- One of the major ingredients of insect repellents is Naphthalene. Consider a situation in which a worker is exposed to this material. The exposure time and concentration is given in a table below: Exposure Time Concentration 275 min 12 ppm 40 min 5 ppm 165 min 10 ppm What is this worker’s time weighted average of exposure? Is the condition hazardous? Exposure Evaluation – Multiple substance, equal exposure time, constant concentrations: 1- A person is exposed to the vapors of Benzene and Ethyl alcohol. Tests show that the concentration of Benzene is 1 ppm and Ethyl alcohol is 450 ppm. What is the threshold limit value of the mix? Is this person at risk? 6- Several workers at a rubber and leather manufacturing company are exposed to vapors of Vinyl chloride, Toluene and Xylene with concentration of 0.2 ppm, 135 ppm 200 mg/m^3 respectively. What is the threshold limit value of the mix? Are the employees at risk? 7- Several workers exposed to vapors of Ammonia, Arsine, Chloroform and Acetone with concentration of 12 ppm, 0.04 mg/m^3, 15 ppm, and 570 mg/m^3 respectively. What is the threshold limit value of the mix? Are the employees at risk?

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