Energy: Difference between revisions

Energy (view source)

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 Energy is the ''work done''. It is [[power]] × time.
-Electrical energy is power (most commonly stated in watts) times a unit of time, most commonly one hour) (watt-hours). 1,000 watt-hours equals one kilowatt-hour (kWh), which is the average amount of power in watts transferred (or used) for 1 hour divided by 1,000. A MWh is equal to 1,000 kWh or 1,000,000 watt-hours. All other metric prefixes can also be applied, e.g., giga (billion), tera (trillion), and peta (quadrillion).
+Electrical energy is power (most commonly stated in watts) times a unit of time (most commonly one hour: watt-hours). 1,000 watt-hours equals one kilowatt-hour (kWh), which is the average amount of power in watts transferred (or used) for 1 hour divided by 1,000. A MWh is equal to 1,000 kWh or 1,000,000 watt-hours. All other metric prefixes can also be applied, e.g., giga (billion), tera (trillion), and peta (quadrillion).
 For comparison or inclusion with other forms of energy. electrical energy can also be measured in joules (J), British thermal units (BTUs), and million [[tonne]] oil equivalent (mtoe). One petajoule (PJ) = 278 GWh. One quadrillion BTU (quad) = 293 TWh. One mtoe = 11,630 GWh.