A microwave oven has a power requirement of 1249 W. A frozendinner requires 6.3

Question

A microwave oven has a power requirement of 1249 W. A frozendinner requires 6.3 min to heat of full power. a. How much eletrical energy (inkWh) is used?-----kWh b. If the cost of electricty is 12 cents per kWh, how muchdoes it cost to heat the dinner?----cents A microwave oven has a power requirement of 1249 W. A frozendinner requires 6.3 min to heat of full power. a. How much eletrical energy (inkWh) is used?-----kWh b. If the cost of electricty is 12 cents per kWh, how muchdoes it cost to heat the dinner?----cents

Explanation / Answer

a) energy = 1249 x 6.3 x 60 = 472122 W - s = 472122 x 0.27777 x 10-3 Wh = 131.145 Wh =0.13145 kWh b) cost = 0.13145 * 12 = 1.57374 cents

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