An Olympic weight lifter lifts 145 kg a vertical distance of 2.1 m. When he does so,

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An Olympic weight lifter lifts 145 kg a vertical distance of 2.1 m. When he does so, 6.0 x 104 J of heat is transferred to air through perspiration. Does he gain or lose internal energy and how much?
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College Physics

ISBN: 978-0321601834

7th edition

Authors: Jerry D. Wilson, Anthony J. Buffa, Bo Lou

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