Why are Watt Hours not Watts per Hour? Are they the same thing?
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Watt hours are a unit of energy or work. A Watt is a unit of power which is the rate of doing work. Watt hours or actually kilowatt hours are used to measure a quantity of electrical energy used. The cost of electricity is based on measuring this. A Watt is measure of how fast work (force times distance) can be done. Car engines could be rated in Watts rather than horsepower. Watt hours is like how much gasoline you burn over a period of time.
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