Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 19 - Exercises and Problems: 13


a) 26.8% b) 7.05% c) 77.0%

Work Step by Step

We know that the maximum efficiency is given by: $$e_{max}=1- \frac{T_c}{T_h}$$ Where $T_c$ is the cold temperature, $T_h$ is the hot temperature, and $e_{max} $ is the maximum efficiency. Now, plug in the given values, remembering to convert to Kelvin. This means that the efficiencies are: a) 26.8% b) 7.05% c) 77.0%
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