physics - Discussion Questions Chapter 22 Q22-1 In a common...

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Q22-1 In a common design for a gyroscope, the flywheel and flywheel axis are enclosed in a light, spherical frame with the flywheel at the center of the frame. The gyroscope is then balanced on top of a pivot so that the flywheel is directly above the pivot. Does the gyroscope precess if it is released while the flywheel is spinning? Explain. Discussion Questions Chapter 22
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Q22-2 The electric force between two charged particles becomes weaker with increasing distance. Suppose that instead the electric force were independent of distance. In this case, would a charged comb still cause a neutral insulator to become polarized as in Fig. 22-5? Why or why not? Would the neutral insulator still be attracted to the comb? Again, why or why not? Discussion Questions Chapter 22
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Q22-3 Your clothing tends to cling together after going through the dryer. Why? Would you expect more or less cling if all your clothing is made of the same material (say, cotton) than if you dry different kinds of clothing together? Again, why? (You may want to experiment with your next load of laundry.) Discussion Questions Chapter 22
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Q22-4 An uncharged metal sphere hangs from a nylon tread. When a positively charged glass rod is brought close to the metal sphere, the sphere is drawn toward the rod. But if the sphere touches the rod, it suddenly flies away from the rod. Explain why the sphere is first attracted, the repelled. Discussion Questions Chapter 22
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Q22-5 The free electrons in a metal are gravitationally attracted toward the earth. Why then, don’t they all settle to the bottom of the conductor, like sediment setting to the bottom of a river? Discussion Questions Chapter 22
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Q22-6 Some of the free electrons in a good conductor (such as a piece of copper) move at speeds of or more. Why don’t these electrons fly out of conductor completely? Discussion Questions Chapter 22 s m / 10 6
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Q22-7 Good electrical conductors, such as metals, are typically good conductors of heat; electrical insulators, such as wood, are typically poor conductors of heat. Explain why there should be a relationship between electrical conduction and heat conduction in these materials. Discussion Questions Chapter 22
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Q22-8 Defend the following statements: “If there were only one electrically charged particle in the entire universe, the concept of electric charge would be meaningless.” Discussion Questions Chapter 22
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Q22-9 Two identical metal objects are mounted on insulating stands. Describe how you could place charges of opposite sign but exactly equal magnitude on the two objects. Discussion Questions Chapter 22
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Plastic food wrap can be used to cover a container by stretching the material across the top and pressing the overhanging material against the sides. What makes it stick? (Hint: The answer involves the electric force.) Does the food wrap stick to itself with equal tenacity? Why or why not? Does it work with metallic containers? Again, why or why not? Discussion Questions
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physics - Discussion Questions Chapter 22 Q22-1 In a common...

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