- The SI unit of energy is the joule. Defined as:
- 1 joule is the work done by a force of 1 newton moving a distance of 1 metre in the direction of the force.
- It may also be defined in electrical terms as:
- the amount of energy needed to sustain 1 amp for 1 sec in a 1-ohm resistance.
Named after James Prescott Joule, one of the first to measure the "rate of exchange" between mechanical energy and heat.
1 J = 1 kgm2s-2
|1 calorie||=||4.1868 joules||1 kilowatt hour||=||3.6x106 J|
|1 therm (EEC)||=||105.506x106 J||1 therm (US)||=||105.4804x106 J|
|1 thermie||=||4.185407x106 J||1 ft lb||=||1.3558179 J|
|1 Btu||=||1055 J||1 electron volt||=||1.602x10-19 J|
|1 joule||=||107 ergs||1 MMcfe||=||1.091 terajoules|
A unit used in the natural gas industry for one million cubic feet of gas equivalent (cfe).
This is a unit of energy equal to about 1.091 terajoules (GJ).