Find the efficiency of a heat engine that absorbs 2500 J of energy from a hot reservoir and exhausts 1000 J to a cold reservoir during a cycle. Suppose a woman does 500 J of work and 9000 J of heat transfer occurs into the environment in the process. What is the decrease in her internal energy, assuming no consumption of food?

Find the efficiency of a heat engine that absorbs 2500 J of energy from a hot reservoir and exhausts 1000 J to a cold reservoir during a cycle. Suppose a woman does 500 J of work and 9000 J of heat transfer occurs into the environment in the process. What is the decrease in her internal energy, assuming no consumption of food?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter10: Work, Energy And Machines

Section: Chapter Questions

Problem 72A

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