400 watts = 0.4 kw
(0.4 kw) x (8 hours) = 3.2 kw-hours
The energy used by a 400 W refrigerator that runs for 8 hours a day is calculated to be 3.2 kWh. This is done by converting watts to kilowatts and then multiplying by the time of usage. Therefore, the refrigerator consumes 3.2 kWh of energy daily.
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