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1. A machine is supplied energy at a rate of 4,000 W and does useful work at a rate of 3,760 W. What's the efficiency of the machine?


A. 92 percent
B. 94 percent
C. 97 percent
D. 96 percent

1 answer

Actual Efficiency/ Theoretical Efficiency *100% = efficiency %

3760 W / 4000 W * 100% = 94%
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