Answered: r. Similarly, a person can be viewed as…

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter4: The Second Law Of Thermodynamics

Section: Chapter Questions

Problem 77AP: A heat engine operates between two temperatures such that the working substance of the engine...

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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 a trained athlete can function as a heat engine with an efficiency of 0.16. (a) What is the magnitude of the internal energy that the athlete uses in order to do 1.7x10⁴ J of work? (b) Determine the magnitude of the heat the athlete gives off.

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