Joule

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.


Dimension: ML2T-2

1 J = 1 kgm2s-2

Conversions
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


MMcfe

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).

See also: Approximate Energy, Calorie, Energy, Erg, Foot Pound, kiloWatt hour, Watt, Work.

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Subjects: Units