Answer
$\epsilon = 75\%$
Work Step by Step
Efficiency of highest $(T_c)$ and lowest temperature $(T_a)$ is
$\epsilon = 1 - \frac{T_a}{T_c} = 1 - \frac{1}{4} = 0.750 = 75\%$
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 20 - Entropy and the Second Law of Thermodynamics - Problems - Page 605: 29d
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