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1 August, 13:48

If a microwave oven emits 1,100 J of energy every second, how long will it take for the microwave to emit 4650 J of energy? Express your answer in seconds using the correct number of significant figures. Do not enter your answer using scientific notation.

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  1. 1 August, 14:49
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    Time = 4.2273 seconds

    Explanation:

    The amount of the energy emitted by the microwave = 1100 J/s

    It means that:

    1100 J of the energy is emitted in 1 second

    Also,

    1 J of the energy is emitted in [tex]/frac {1}{1100}[tex] second

    To calculate:

    Time for emitting 4650 J of energy

    Thus,

    4650 J of the energy is emitted in [tex]/frac {1}{1100}/times 4650[tex] second

    Time = 4.2273 seconds
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