(a) What is the efficiency of an out-of-condition professor who does 2.10 x 105 J of useful work while metabolizing 490

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A What Is The Efficiency Of An Out Of Condition Professor Who Does 2 10 X 105 J Of Useful Work While Metabolizing 490 1 (21.42 KiB) Viewed 33 times

(a) What is the efficiency of an out-of-condition professor who does 2.10 x 105 J of useful work while metabolizing 490 kcal of food energy? (Enter your answer as a percentage. Enter a number.) % (b) How many food calories (in kcal) would a well-conditioned athlete metabolize in doing the same work with an efficiency of 20%? (Enter a number.) kcal