L4_22.pptx - Topics for Today Go over exam Traveling sound...

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Topics for Today Go over exam Traveling sound waves (17-2) Interference (17-3) Sources of musical sound (17-5)
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Exam #3 EXAM 3 A 12-15 B 9-11 C 5-8 D 3-4 F 0-2
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A solid sphere and a hollow sphere each of mass M and radius R are released at the same time from the top of an inclined plane. Which one of the following statements is necessarily true? A) The hollow sphere will reach the bottom first. B) The solid sphere will reach the bottom first. C) Both spheres will reach the bottom at the same time. D) The hollow sphere will reach the bottom with the greater kinetic energy. E) The solid sphere will reach the bottom with the greater kinetic energy. Rolling
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A large water tank, open at the top, has a small hole in the bottom. When the water level is 30 m above the bottom of the tank, the speed of the water leaking from the hole: A) is 2.5 m/s B) is 24 m/s C) is 44 m/s D) cannot be calculated unless the area of the hole is given E) cannot be calculated unless the areas of the hole and tank are given Fluids
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A spinning skater draws in her outstretched arms thereby reducing her moment of inertia by a factor of 2. Determine the ratio of her final kinetic energy to her initial kinetic energy.
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