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9 February, 21:31

7. Batman recharges his Bat-taser with 2.5MJ of energy in 15 minutes. How much Power does it draw from the mains?

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  1. 9 February, 23:32
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    Power does it draw from the mains = 2.78 kW

    Explanation:

    Power = Work / Time.

    Here work done = Energy used by Bat taser = 2.5 MJ = 2.5 x 10⁶ J

    Time taken = 15 minutes = 15 x 60 = 900 seconds.

    Power = Work / Time = 2.5 x 10⁶/900 = 2777.78 Watt = 2.78 kW

    Power does it draw from the mains = 2.78 kW
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