Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 18 - Plug and Chug: 34

Answer

Ideal efficiency = $\frac{2700 K – 200 K}{2700 K} = 0.93 = 93\%$.
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