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26-02-2018
Advanced Placement (AP)

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Suppose your electric lights use 500 watts per hour and average four hours per day, every day for one year. How many kWh per year does this represent?

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Bluebirds Bluebirds

26-02-2018

First, convert watts to kilowatts.

500w/1000= .5 kW per hour

.5*4 hours= 2kwh*365 days= 730 kWh

The answer is 730 kwh per year

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