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    How much do you know about Mechanical Aptitude?

    What does the second law of thermodynamics say about heat engines, in a simplified way?

    Answers

    All heat can be converted into work without loss
    Temperature does not influence efficiency
    Energy is not conserved
    It is not possible to convert all the heat absorbed into work: there is always dissipation/entropyCorrect

    Efficiency is limited: heat is always rejected to a cold source and entropy increases; there is no 100% conversion.

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