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Efficiency calculations

Physics · Energy & Work

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About this practice set

Efficiency calculations is part of Physics (Energy & Work). Questions are generated with new numbers each time you practise. Levels available: Easy. After you answer, an explanation is shown.

Example questions

A taste of what you will practise. Answers are revealed after you try.

  • Easy

    A machine does 87.5 J of useful work from 175 J of input energy. What is its efficiency?