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HORSEPOWER = a unit of power equal to a rate of 33,000 foot - pounds per minute (the force required to raise 33,000 pounds at the rate of one foot per minute) WATT = a unit of electrical power equal to one ampere under one volt of pressure, or one joule per second

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Infographic: Electricity A visual cheat sheet

Infographic: Electricity A visual cheat sheet about electrical physics, containing the most important formulas of current and Ohm’s law expressed through an impossible water circuit analogy. (by Pierluigi Scotolati)

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Bảng công thức tính toán volt, ampere, watt,...

BTU = British Thermal Unit, a unit of heat equal to 252 calories, or the quantity of heat required to raise the temperature of one pound of water from 62 °F to 63 °F JOULE = a unit of electrical energy or work equivalent to the work done to raise one coulomb of electricity one volt, or in maintaining for one second a current of one ampere against a resistance of one ohm FOOT POUND = a unit of work equal to the amount of energy required to raise a weight of one pound a distance of one foot

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An electronics desk reference.The volt, ohm, and ampere are related in the Ohm's Law Wheel. The resistor color code is graphically shown. A chart of circuit symbols is also given.