(a) What is the efficiency of an out-of-condition professor who does 2.10105 J of useful
Chapter 7, Problem 47(choose chapter or problem)
(a) What is the efficiency of an out-of-condition professor who does 2.10105 J of useful work while metabolizing 500 kcal of food energy? (b) How many food calories would a well-conditioned athlete metabolize in doing the same work with an efficiency of 20%?
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