#### Answer

62%

#### Work Step by Step

In order to make a straight line, one should plot $\frac{T_h}{T_h-T_c}$ versus COP. Doing this in Microsoft excel, we find that the efficiency of the engine (compared to its maximum) is: 62 percent.

Published by
Pearson

ISBN 10:
0321993721

ISBN 13:
978-0-32199-372-4

62%

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