The 'ERG' is the standard unit for work or mechanical energy.
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Amps measure electrical current, while horsepower measures the power output of an engine or motor. Amps are used in electrical circuits to measure the flow of electricity, while horsepower is a unit of measure for mechanical power.
work and energy +++ The Joule (J) is the unit of energy, alone, not of work. The Watt (W) is the unit of power, i.e. work done in converting or transferring energy, and 1W = 1J/s.
One commonly used measure of productivity is output per hour worked, also known as labor productivity. It measures the amount of output produced per unit of labor input. This measure helps businesses and economists assess efficiency and overall economic performance.
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The unit used to measure chemical energy is the joule (J) or the calorie (cal).