http://www.econlib.org/library/Smith/smWN1.html#B.I,%20Ch.1,%20Of%20the%20Division%20of%20Labor What does Smith mean by division of labor, and … Read More...
A load of 140,000 N (31,500 lbf) is applied to a cylindrical specimen of a steel alloy (displaying the stress–strain behavior shown in Figure 6.22) that has a cross-sectional diameter of 10 mm (0.40 in.). (a) Will the specimen experience elastic and/or plastic deformation? Why? (b) If the original specimen length is 500 mm (20 in.), how much will it increase in length when this load is applied?

## A load of 140,000 N (31,500 lbf) is applied to a cylindrical specimen of a steel alloy (displaying the stress–strain behavior shown in Figure 6.22) that has a cross-sectional diameter of 10 mm (0.40 in.). (a) Will the specimen experience elastic and/or plastic deformation? Why? (b) If the original specimen length is 500 mm (20 in.), how much will it increase in length when this load is applied?

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FSE 100 Extra Credit (20 points) Instructions: Read the description below and work through the design process to build an automated waste sorting system. Turn in the following deliverables in one document, typed: 1. Problem Statement – 1 point 2. Technical System Requirements (at least 3 complete sentences using “shall”) – 3 points 3. Judging Criteria (at least 3, explain why you chose them) – 2 points 4. AHP – 2 points 5. Summaries of your 3 design options (paragraph minimum for each option) – 3 points 6. Design Decision Matrix – 3 points 7. Orthographic Drawing of your final design (3 projections required) – 3 points 8. Activity Diagram of how your sorter functions – 3 points Description: The city of Tempe waste management has notified ASU that due to the exceptional effort the Sundevil students have made in the sustainability area, ASU has been contributing three times the amount of recyclable materials than what was predicted on a monthly basis. Unfortunately, due to the immense amount of materials being delivered, the city of Tempe waste management has asked for assistance from ASU prior to picking up the recyclable waste. They have requested that ASU implement an automated waste sorting system that would pre-filter all the materials so the city of Tempe can collect the materials based on one of three types and process the waste much faster. ASU has hired you to design an automated sorter, but due to the unexpected nature of this request, ASU prefers that this design be as simple and inexpensive to build as possible. The city of Tempe would like to have the waste categorized as either glass, plastic, or metal. Paper will not be considered in this design. Any glass that is sorted in your device needs to stay intact, and not break. Very few people will be able to monitor this device as it sorts, so it must be able to sort the items with no input from a user, as quickly as possible. This design cannot exceed 2m in length, width, or height, but the weight is unlimited. ASU is not giving any guidance as to the materials you can use, so you are free to shop for whatever you’d like, but keep in mind, the final cost of this device must be as inexpensive as possible. Submit through Blackboard or print out your document and turn it in to me no later than the date shown on Blackboard

## FSE 100 Extra Credit (20 points) Instructions: Read the description below and work through the design process to build an automated waste sorting system. Turn in the following deliverables in one document, typed: 1. Problem Statement – 1 point 2. Technical System Requirements (at least 3 complete sentences using “shall”) – 3 points 3. Judging Criteria (at least 3, explain why you chose them) – 2 points 4. AHP – 2 points 5. Summaries of your 3 design options (paragraph minimum for each option) – 3 points 6. Design Decision Matrix – 3 points 7. Orthographic Drawing of your final design (3 projections required) – 3 points 8. Activity Diagram of how your sorter functions – 3 points Description: The city of Tempe waste management has notified ASU that due to the exceptional effort the Sundevil students have made in the sustainability area, ASU has been contributing three times the amount of recyclable materials than what was predicted on a monthly basis. Unfortunately, due to the immense amount of materials being delivered, the city of Tempe waste management has asked for assistance from ASU prior to picking up the recyclable waste. They have requested that ASU implement an automated waste sorting system that would pre-filter all the materials so the city of Tempe can collect the materials based on one of three types and process the waste much faster. ASU has hired you to design an automated sorter, but due to the unexpected nature of this request, ASU prefers that this design be as simple and inexpensive to build as possible. The city of Tempe would like to have the waste categorized as either glass, plastic, or metal. Paper will not be considered in this design. Any glass that is sorted in your device needs to stay intact, and not break. Very few people will be able to monitor this device as it sorts, so it must be able to sort the items with no input from a user, as quickly as possible. This design cannot exceed 2m in length, width, or height, but the weight is unlimited. ASU is not giving any guidance as to the materials you can use, so you are free to shop for whatever you’d like, but keep in mind, the final cost of this device must be as inexpensive as possible. Submit through Blackboard or print out your document and turn it in to me no later than the date shown on Blackboard

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Materials are characterized by: a. Macroscopic properties b. Microstructure c. Atomic level composition d. All of the above 2. Atoms are: a. Composed of only electrons b. An abstract concept c. Found in fractional units d. Composed of a nucleus and electrons 3. The Burger’s vector describes: a. Cracks b. Crystal twinning c. The most direct route to McDonald’s d. Geometry of a crystal dislocation 4. Cubic Close Packed (CCP) is another name for which of the following: a. HCP b. BCC c. FCC d. All of the above 5. Un-vulcanized elastomers tend to: a. Fail catastrophically at low strain b. Be composed of metallic grains c. Deform plastically before failure d. Have elastic moduli ~109 Pa 6. Solid state diffusion & vacancy generation: a. Show Arrhenius-type behavior b. Are completely unrelated c. Increase linearly with Temperature d. Describe the motion of lattice points 7. Diffusion & heat transfer: a. Are completely unrelated b. Are directly related phenomena c. Relate a flux to a gradient d. Increase linearly with Temperature 8. Dislocations: a. Are interstitial dopants b. Are crystal defects c. Require atomic impurities d. Enhance plastic deformation 9. A typical atomic radii is roughly: a. 1 centimeter b. 1 nanometer c. 1 picometer d. 1 angstrom 10. Cubic crystal lattices have: a. Equal edge lengths b. 90° angles between edges c. Both a. & b. d. Atoms at each corner 11. Body centered cubic metals have: a. Close packed directions b. Close packed planes c. Both a. & b. d. Neither a. or b. 12. Face centered cubic metals have: a. Close packed directions b. Close packed planes c. Both a. & b. d. Neither a. or b. 13. A crystal lattice is an: a. Idealized representation of crystal sites in a real crystal b. Exact crystal representation c. Both a. & b. d. Neither a. or b. 14. Defects in a real crystal: a. Are at lattice sites b. Are within interstices c. Improve properties d. Decrease properties e. Require extensive characterization as they may involve a., b., c., & d. 15. Dislocations in metal grains: a. Prevent dislocation motion b. Can be removed through recrystallization c. Improve properties d. Decrease properties e. Require extensive characterization as they may involve a., b., c., & d. 16. The KIC parameter is used to describe: a. The number of possible pizza topping combinations at a given restaurant b. Dislocation density c. Weakening of a material due to cracks/stress concentrations d. The degree of Cold Working

## Materials are characterized by: a. Macroscopic properties b. Microstructure c. Atomic level composition d. All of the above 2. Atoms are: a. Composed of only electrons b. An abstract concept c. Found in fractional units d. Composed of a nucleus and electrons 3. The Burger’s vector describes: a. Cracks b. Crystal twinning c. The most direct route to McDonald’s d. Geometry of a crystal dislocation 4. Cubic Close Packed (CCP) is another name for which of the following: a. HCP b. BCC c. FCC d. All of the above 5. Un-vulcanized elastomers tend to: a. Fail catastrophically at low strain b. Be composed of metallic grains c. Deform plastically before failure d. Have elastic moduli ~109 Pa 6. Solid state diffusion & vacancy generation: a. Show Arrhenius-type behavior b. Are completely unrelated c. Increase linearly with Temperature d. Describe the motion of lattice points 7. Diffusion & heat transfer: a. Are completely unrelated b. Are directly related phenomena c. Relate a flux to a gradient d. Increase linearly with Temperature 8. Dislocations: a. Are interstitial dopants b. Are crystal defects c. Require atomic impurities d. Enhance plastic deformation 9. A typical atomic radii is roughly: a. 1 centimeter b. 1 nanometer c. 1 picometer d. 1 angstrom 10. Cubic crystal lattices have: a. Equal edge lengths b. 90° angles between edges c. Both a. & b. d. Atoms at each corner 11. Body centered cubic metals have: a. Close packed directions b. Close packed planes c. Both a. & b. d. Neither a. or b. 12. Face centered cubic metals have: a. Close packed directions b. Close packed planes c. Both a. & b. d. Neither a. or b. 13. A crystal lattice is an: a. Idealized representation of crystal sites in a real crystal b. Exact crystal representation c. Both a. & b. d. Neither a. or b. 14. Defects in a real crystal: a. Are at lattice sites b. Are within interstices c. Improve properties d. Decrease properties e. Require extensive characterization as they may involve a., b., c., & d. 15. Dislocations in metal grains: a. Prevent dislocation motion b. Can be removed through recrystallization c. Improve properties d. Decrease properties e. Require extensive characterization as they may involve a., b., c., & d. 16. The KIC parameter is used to describe: a. The number of possible pizza topping combinations at a given restaurant b. Dislocation density c. Weakening of a material due to cracks/stress concentrations d. The degree of Cold Working

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In the movie Bubble Boy, Jimmy lives inside a plastic bubble where he is protected from all outside agents. Which type of disease would require a child to live inside a plastic bubble? Select one: an autoimmune disease systemic lupus erythematosus multiple sclerosis AIDS a total immune deficiency

## In the movie Bubble Boy, Jimmy lives inside a plastic bubble where he is protected from all outside agents. Which type of disease would require a child to live inside a plastic bubble? Select one: an autoimmune disease systemic lupus erythematosus multiple sclerosis AIDS a total immune deficiency

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1) a) Explain why metals are ductile and ceramics are brittle, in terms of their dislocation motion. b) Draw 2 pictures to sequentially show an edge dislocation gliding through a crystal, using dots to represent the atoms. c) Draw 2 pictures to show how a dislocation can climb by capturing a vacancy. d) What factors limit dislocation mobility? e) What positive and negative effects does limiting dislocation mobility have on mechanical properties?

## 1) a) Explain why metals are ductile and ceramics are brittle, in terms of their dislocation motion. b) Draw 2 pictures to sequentially show an edge dislocation gliding through a crystal, using dots to represent the atoms. c) Draw 2 pictures to show how a dislocation can climb by capturing a vacancy. d) What factors limit dislocation mobility? e) What positive and negative effects does limiting dislocation mobility have on mechanical properties?

1)    a) Explain why metals are ductile and ceramics are … Read More...
Question 2 A 4.0 mm diameter plastic rod, 2.2 m long, has of charge 1.4μC uniformly spread over its surface. The electric field very near the surface at the middle of the rod is: A. 2.3 × 10 N/C B. 8.1 × 10 N/C C. 1.4 × 10 N/C D. 2.9 × 10 V/m +

## Question 2 A 4.0 mm diameter plastic rod, 2.2 m long, has of charge 1.4μC uniformly spread over its surface. The electric field very near the surface at the middle of the rod is: A. 2.3 × 10 N/C B. 8.1 × 10 N/C C. 1.4 × 10 N/C D. 2.9 × 10 V/m +

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MSE201 Midterm Exam 10/17/2014 Each element 2 points. Put ALL calculations and answers in your Blue Book! 1. Materials are characterized by: a. Macroscopic properties b. Microstructure c. Atomic level composition d. All of the above 2. Atoms are: a. Discrete units of matter b. An abstract concept c. Found in fractional units d. Crystallographic lattice points 3. The Burger’s vector describes: a. Surface cracks b. Crystal twinning c. Dislocation geometry d. The most direct route to McDonald’s 4. Cubic Close Packed (CCP) is another name for which of the following: a. HCP b. BCC c. FCC d. All of the above 5. Glass and ceramic materials tend to: a. Fail catastrophically at low strain b. Show ductility c. Deform plastically before failure d. Have elastic moduli ~106 Pa 6. Solid state diffusion & vacancy generation: a. Are completely unrelated b. Are directly related c. Increase linearly with Temperature d. Describe lattice point motion 7. Diffusion & heat transfer: a. Are completely unrelated b. Are directly related c. Increase linearly with Temperature d. Have identical differential equations 8. A vacancy and a dislocation both: a. Disrupt the crystal lattice b. Represent partial occupancy c. Contain ruptured bonds d. Are low energy regions 9. Dislocations: a. Are interstitial dopants b. Are crystal defects c. Require atomic impurities d. Enhance plastic deformation 10. Ionic, covalent and metallic bonding are primary bonding types. a. Primary bonds require exchange or sharing of what between atoms? b. How does electronegativity drive the reaction of sodium metal and chlorine gas to form sodium chloride? c. Carbon-carbon bonds are what type? d. The directional nature of covalent bonds is related to what structural feature of atoms? 11. The (111) plane of the FCC structure is close-packed. a. Sketch this plane within a unit cell. b. How many atoms are on the plane you drew inside the unit cell? c. Estimate the area of the plane d. Calculate the area atomic density e. If there is one vacancy per 1012 lattice points at 273K, what is the partial atomic occupancy of each lattice point? f. If you are asked calculate the number of vacancies present at 600K, what additional information do you need? 12. Dislocation motion occurs largely along close-packed directions and planes. First, compare the FCC & BCC structures: a. Describe any close packed planes b. Describe any close packed directions c. If the ductile-to-brittle transition at low temperatures is related to the number of close-packed directions and planes, do you expect BCC or FCC metals to have greater ductility? d. Magnesium and other HCP metals are brittle. Does your analysis from 12.c. support this observation? 13. A tensile test is performed on a ductile sample. The first 1% of strain is elastic with a modulus of 100E9 Pa, at which point plastic deformation begins. The tensile strength of 1.1E9 Pa is determined at 9% strain, while failure occurs at a stress of 9E8 Pa and strain of 18%. a. Sketch the complete stress-strain cycle b. Estimate the toughness in units of J/m3.

## MSE201 Midterm Exam 10/17/2014 Each element 2 points. Put ALL calculations and answers in your Blue Book! 1. Materials are characterized by: a. Macroscopic properties b. Microstructure c. Atomic level composition d. All of the above 2. Atoms are: a. Discrete units of matter b. An abstract concept c. Found in fractional units d. Crystallographic lattice points 3. The Burger’s vector describes: a. Surface cracks b. Crystal twinning c. Dislocation geometry d. The most direct route to McDonald’s 4. Cubic Close Packed (CCP) is another name for which of the following: a. HCP b. BCC c. FCC d. All of the above 5. Glass and ceramic materials tend to: a. Fail catastrophically at low strain b. Show ductility c. Deform plastically before failure d. Have elastic moduli ~106 Pa 6. Solid state diffusion & vacancy generation: a. Are completely unrelated b. Are directly related c. Increase linearly with Temperature d. Describe lattice point motion 7. Diffusion & heat transfer: a. Are completely unrelated b. Are directly related c. Increase linearly with Temperature d. Have identical differential equations 8. A vacancy and a dislocation both: a. Disrupt the crystal lattice b. Represent partial occupancy c. Contain ruptured bonds d. Are low energy regions 9. Dislocations: a. Are interstitial dopants b. Are crystal defects c. Require atomic impurities d. Enhance plastic deformation 10. Ionic, covalent and metallic bonding are primary bonding types. a. Primary bonds require exchange or sharing of what between atoms? b. How does electronegativity drive the reaction of sodium metal and chlorine gas to form sodium chloride? c. Carbon-carbon bonds are what type? d. The directional nature of covalent bonds is related to what structural feature of atoms? 11. The (111) plane of the FCC structure is close-packed. a. Sketch this plane within a unit cell. b. How many atoms are on the plane you drew inside the unit cell? c. Estimate the area of the plane d. Calculate the area atomic density e. If there is one vacancy per 1012 lattice points at 273K, what is the partial atomic occupancy of each lattice point? f. If you are asked calculate the number of vacancies present at 600K, what additional information do you need? 12. Dislocation motion occurs largely along close-packed directions and planes. First, compare the FCC & BCC structures: a. Describe any close packed planes b. Describe any close packed directions c. If the ductile-to-brittle transition at low temperatures is related to the number of close-packed directions and planes, do you expect BCC or FCC metals to have greater ductility? d. Magnesium and other HCP metals are brittle. Does your analysis from 12.c. support this observation? 13. A tensile test is performed on a ductile sample. The first 1% of strain is elastic with a modulus of 100E9 Pa, at which point plastic deformation begins. The tensile strength of 1.1E9 Pa is determined at 9% strain, while failure occurs at a stress of 9E8 Pa and strain of 18%. a. Sketch the complete stress-strain cycle b. Estimate the toughness in units of J/m3.

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