Problem

A microwave oven has a power requirement of 1250 W. A frozen dinner requires 4.0 min to...

A microwave oven has a power requirement of 1250 W. A frozen dinner requires 4.0 min to heat on full power.

(a) How much electrical energy (in kWh) is used?

(b) If the cost of electricity is per kWh, then how much does it cost to heat the dinner?

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Solutions For Problems in Chapter 4

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