Answer
$ \eta = 33.33\%$
Work Step by Step
We know that
$ W=Q_1 -Q_2$
$200J = Q_1 -400J$
$ Q_1 = 600J$
Also
$ \eta = \frac{W}{Q_1}$
$\eta = \frac{200J}{600J}$
$ \eta = 33.33\%$
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)
by Knight, Randall D.
Published by
Pearson
ISBN 10:
0321740904
ISBN 13:
978-0-32174-090-8
Chapter 18 - Heat Engines and Refrigerators - Exercises and Problems - Page 549: 2
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