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2 September, 08:53

Electric power companies measure energy consumption in kilowatt-hours, denoted kWh. One kilowatt-hour is the amount of energy transferred by 1 kW of power in a period of 1 hour. A power company billing statement reports auser's total energy usage to be 1500 kWh. Find the amount of energy in joules used during the billing period.

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  1. 2 September, 09:04
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    The amount of energy used in the billing period is 5,400,000,000 joules.

    One kWH is the amount of energy transferred in one hour, there 1 kWh is equal to

    1 kWh=1*1000 * (J/s) * 3600 s

    =3600000 J

    Thus the amount of energy in joules consumed by the user for the billing period is = 1500*3600000=5,400,000,000 J.

    The amount of energy used in the billing period is 5,400,000,000 joules.
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