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1. Is it possible for two screw dislocations of opposite sign to annihilate each other? Explain your answer.
2. For each of edge, screw, and mixed dislocations, cite the relationship between the direction of the applied shear stress and the direction of dislocation line motion.
3. (a) Define a slip system.
(b) Do all metals have the same slip system? Why or why not?
4. (a) Compare planar densities (Section 3.11 and Problem 3.53) for the (100), (110), and (111) planes for FCC.
(b) Compare planar densities (Problem 3.54) for the (100), (110), and (111) planes for BCC.
a small household refrigerator is used to cool 20 liters of water initially at 22 degrees c. the cop of the
A layer of water seperates two smooth surfaces a distance of 2r. Derive an experssion for the force needed to pul the two surfaces apart. Consider the bottom surface fixed. What is the force needed to seperate the top surface?
A spacecraft used in the exploration of Jupiter has a mass of 425 kg. Find the weight of this spacecraft, in N, (a) on the surface of Jupiter where the acceleration of gravity is 25.94 m/s2 and b) on earth where the acceleration of gravity is 9.81 m/..
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An ordinary vapor compression cycle using propane operates at temperatures of 240 K in the cold heat exchanger, and 280 K in the hot heat exchanger. How much work is required per kg of propane circulated in the compressor is 80% efficient? What cooli..
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