Solved: Heat engines take input energy in the form of
Chapter 15, Problem 15.103(choose chapter or problem)
Heat engines take input energy in the form of heat, use some of that energy to do work, and exhaust the remainder. Similarly, a person can be viewed as a heat engine that takes an input of internal energy, uses some of it to do work, and gives off the rest as heat. Suppose that a trained athlete can function as a heat engine with an efficiency of 0.11. (a) What is the magnitude of the internal energy that the athlete uses in order to do 5.1 104 J of work? (b) Determine the magnitude of the heat the athlete gives off.
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