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and the world energy consumption.

Distinction between kWh (energy) and kW (power)

A kilowatt is a unit of power (rate of flow of energy per unit of time). A kilowatt-hour is a unit of energy. Kilowatt per hour would be a rate of change of power flow with time.

Work is the amount of energy transferred to a system; power is the rate of delivery of energy.Energy is measured in joules,

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