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27 March, 15:34

an instrument used a battery that provides 500 j of energy for 1200 seconds. what is the power of the instrument?

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  1. 27 March, 15:49
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    Answer: 0.42watts

    Explanation:

    Energy of the battery = 500 J

    Time = 1200 seconds

    Power of the instrument = ?

    Recall that power is the rate of energy expended in doing work. Thus, power is energy expended divided by time taken.

    i. e Power = (energy/time)

    Power = 500J/1200 seconds

    Power = 0.416 watts (Round to the nearest hundredth which is 0.42 watts)

    Thus, the power of the instrument is 0.42watts
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