Essential University Physics: Volume 1 (4th Edition)

Published by Pearson
ISBN 10: 0-134-98855-8
ISBN 13: 978-0-13498-855-9

Chapter 19 - Exercises and Problems - Page 364: 74



Work Step by Step

We see that the energy used is much greater than the energy used by the lightbulb in the refrigerator. Thus, a is incorrect. Since electrical energy is required to cool the contents, even if there is a large amount of insulation, b is also incorrect. Since this energy cannot be easily used as electrical energy after use in the fridge, it is not "high quality." This leaves d as the correct answer.
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