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A unit of electrical energy, particularly for utility bills, is the kilowatt-hour (kWh); [3] one kilowatt-hour is equivalent to 3.6 megajoules. Electricity usage is often given in units of kilowatt-hours per year or other periods. [4] This is a measurement of average power consumption, meaning the average rate at which energy is transferred ...
Kinetic energy of a 2 tonne [108] vehicle at 32 metres per second (115 km/h or 72 mph) [111] 1.2×10 6 J: Approximate food energy of a snack such as a Snickers bar (280 food calories) [112] 3.6×10 6 J = 1 kWh (kilowatt-hour) (used for electricity) [59] 4.2×10 6 J: Energy released by explosion of 1 kilogram of TNT [59] [99] 6.1×10 6 J
1.0 TJ (280,000 kWh) gigajoule: GJ GJ 1.0 GJ (280 kWh) megajoule: MJ MJ 1.0 MJ (0.28 kWh) kilojoule: kJ kJ 1.0 kJ (240 cal) hectojoule: hJ hJ 1.0 hJ (24 cal) decajoule: daJ daJ 1.0 daJ (2.4 cal) joule: J J 1.0 J (0.24 cal) decijoule: dJ dJ 1.0 dJ (0.024 cal) centijoule: cJ cJ 1.0 cJ (0.0024 cal) millijoule: mJ mJ 1.0 mJ (0.00024 cal) microjoule ...
The joule (/ dʒ uː l / JOOL, or / dʒ aʊ l / JOWL; symbol: J) is the unit of energy in the International System of Units (SI). [1] It is equal to the amount of work done when a force of one newton displaces a mass through a distance of one metre in the direction of that force.
Electric power is the rate of transfer of electrical energy within a circuit.Its SI unit is the watt, the general unit of power, defined as one joule per second.Standard prefixes apply to watts as with other SI units: thousands, millions and billions of watts are called kilowatts, megawatts and gigawatts respectively.
1 terawatt hour per year = 1 × 10 12 W·h / (365 days × 24 hours per day) ≈ 114 million watts, equivalent to approximately 114 megawatts of constant power output. The watt-second is a unit of energy, equal to the joule. One kilowatt hour is 3,600,000 watt seconds.
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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, or watt-seconds. Power is measured in watts, or joules per second. For example, a battery stores energy.