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06-01-2018
Chemistry

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If it takes 15 minutes to dry your hair with a 1.200 kW hair drier, how much energy is used in drying your hair?

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06-01-2018

1.2 kW is 1.2 kJ per second.

15 minutes is 900 seconds.

900*1.2 = 1080 kJ or 1080000 J

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