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OpenStudy (inexilewetrust):
If the efficiency of a heat engine that does 1.00 × 103 J of work is 70 percent, then what is the heat input? 1.43 × 10 J 7.00 × 102 J 9.30 × 102 J 1.43 × 103 J No clue, can someone explain how to do this?
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