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Calculate the change in potential energy of a 88.4 kg man when he takes an elevator from the first floor to 33th floor, if the distance between floors is 3.93 m.
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Question: The superheroine Xanaxa, with a mass of 65.9 kg, is in a hair-raising chase after the 76.1-kg arch-villain Lexlax. She leaps from the ground to the top of a 183-m-high building, then dives off and comes to rest ...
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