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12 August, 04:56

Sound wave A delivers 2 J of energy in 2 s. Sound wave B delivers 10 J of energy in 5 s. Sound wave C delivers 2 mJ of energy in 1 ms. Rank in order, from largest to smallest, the sound powers of Pa, Pb, Pc of these three waves.

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  1. 12 August, 05:30
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    In the order largest to smallest

    Pc = Pb, Pa

    Explanation:

    Power = Energy expended/time

    Pa = 2/2 = 1Watt

    Pb = 10/5 = 2Watt

    Pc = 2E-3/1E-3 = 2Watt
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