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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 at the bottom of a 17.9-m-deep excavation, where she finds Lexlax and neutralizes him. Does all this bring about a net gain or a net loss of gravitational potential energy?

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