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22 February, 15:06

How much energy, in kJ does a 75 watt light bulb use when it is on for 25 minutes

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  1. 22 February, 16:43
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    112.5 KJ

    Explanation:

    Energy = Power x Time

    Time = 25 minutes

    = 25 x 60 sec = 1500 sec

    Power = 75 watt

    Energy = 75 x 1500

    112,500 Joules

    Energy in KJ = 112,500/1000

    = 112.5 KJ
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