A microwave oven has a power requirement of 1264 W. A frozen dinner requires 5.5 min to heat on full power.
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To calculate the energy used by the microwave oven to heat the frozen dinner, we need to use the power requirement and the amount of time it takes to heat.
First, convert the time from minutes to seconds:
5.5 min = 5.5 × 60 = 330 seconds
Next, multiply the power requirement by the heating time to get the energy used:
Energy = Power × Time
Energy = 1264 W × 330 s = 416,520 J (Joules)
Therefore, the microwave oven uses 416,520 Joules of energy to heat the frozen dinner.