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7 August, 13:49

Nicholas sends 20.0 minutes ironing shirts with his 1800-watt irn. How many joules of energy were usedby the iron

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  1. 7 August, 14:06
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    1 watt = 1 joule/sec

    1800 watts = 1800 joules/sec

    (1800 J/sec) x (20 min) x (60 sec/min)

    = (1800 x 20 x 60) joules = 2,160,000 joules.

    (2.16 megajoules)
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