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22 October, 02:29

In each cycle, a heat engine receives an input of 1540 J of heat and exhausts 1030 J of heat. What is the thermal efficiency?

0.274

0.456

0.669

0.331

+2
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  1. 22 October, 02:44
    0
    The thermal efficiency of a combustion system is simply the ratio of heat out and heat in, that is:

    efficiency = heat out / heat in

    efficiency = 1030 J / 1540 J

    efficiency = 0.669

    So the efficiency is 0.669
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