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And yet, power just means energy flow per unit time. We all know the Watt is a unit of power consumption and have an idea how quickly a 1500 Watt kettle boils water. The unit of energy is the Joule - a Watt is just a flow of one Joule per second. The other popular unit of power is the horsepower. The conversion is that one horsepower = 756 Watts. A 100-HP car would be able to turn a 75,600 - Watt electrical generator, or 75.6 kilowatts. So anybody who does talk about energy, rarely speaks in Joules.
The unit measurement of power is the Watt, which is defined as 1 joule per second. This is rather a small unit so it generally becomes kilowatts or megawatts.