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17 June, 08:42

How much electrical energy is used by a 75 W laptop that is operating for 12

minutes?

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  1. 17 June, 10:53
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    "1 watt" means 1 joule of energy per second.

    75 W means 75 joules/sec.

    Energy = (75 Joule/sec) x (12 min) x (60 sec/min)

    Energy = (75 x 12 x 60) (Joule-min-sec / sec-min)

    Energy = 54,000 Joules
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