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16 August, 11:11

17.) A microwave is rated at 750 watts. How long will it take the microwave to do 5700 J of work on a cup of water? Assume 100% efficiency.

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  1. 16 August, 11:42
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    To answer the question above, we make use of the equation,

    Work = Power x time

    From the equation, time may be solved through

    time = Work / Power

    Substituting the known values from the given,

    time = (5700 J) / (750 J/s)

    = 7.6 s
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