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Sample MidTerm 2 - Sample Mid-Term 2 Name MULTIPLE CHOICE...

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Sample Mid-Term 2 Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Two life preservers have identical volumes, but one is filled with styrofoam while the other is filled with sand. When the two life preservers are worn by swimmers so that one swimmer floats with part of the preserver above water, and the other swimmer sinks, the buoyant force is actually greater on the life preserver filled with A) sand. B) styrofoam. C) same 1) 2) If the polar icecaps melted, the resulting water would spread over the entire earth. This new mass distribution would tend to make the length of a day A) longer. B) stay the same. C) shorter. D) longer at first, then shorter. E) shorter at first, then longer. 2) 3) When a twirling ice skater brings her arms inward, her rotational speed A) decreases. B) remains the same. C) increases. 3) 4) Consider a bowling alley inside a rotating space torus (huge "donut"). Compared to your bowling experience on earth, you will notice that the ball 4) 5) A swimming area in a rotating space habitat is located in a 1 4 g region. If a diver can jump 1 m high in a 1 g region, how high can the same diver jump in the swimming area? 5) 6) The faster a fluid moves, the 6) 1
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7) Two vertical tubes of equal cross-sectional areas are filled with water and mercury. If water is filled to a depth of 10.3 m and mercury to a depth of 0.76 m, both liquids have equal A) densities. B) viscosity. C) weights. D) volumes. E) none of these 7) 8) Which of the following is an example of matter in a plasma state? 8) 9) There is a legend of a Dutch boy who bravely held back the Atlantic Ocean by plugging a leak near the top of a dike with his finger until help arrived. Which of the following is most likely? 9)
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