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    Physics A-Level

    Heat engine efficiency

    What Heat engine efficiency means in Physics A-Level, as defined for AQA.

    Definition of Heat engine efficiency

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    Reference: AQA

    Useful work divided by heat absorbed, given as W/Q_h, and always less than 1 when Q_c is positive.
    AQA · Second Law and engines (A-level only) (study guide)

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