February 19, 2017

Homework Help: physical science

Posted by Unmei on Tuesday, May 27, 2014 at 4:57pm.

A machine is supplied energy at a rate of 4,000 W and does useful work at a rate of 3,760 W. What is the efficiency of the machine?
A. 92 percent
B. 94 percent
C. 97 percent
D. 96 percent

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