Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)

Published by Pearson
ISBN 10: 0321740904
ISBN 13: 978-0-32174-090-8

Chapter 18 - Heat Engines and Refrigerators - Conceptual Questions - Page 549: 9

Answer

a) is not while b) and c) are possible refrigerators.

Work Step by Step

Diagram a) shows that external heat is supplied to cold reservoir which is not possible for refrigerator. While b) and c) show external energy is used to drive out heat from cold reservoir which is true for refrigerators.
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