Joule – unit of work, energy or amount of heat in the International system of units (SI). Has the Russian designation – j and international designation – J.
Other units of measurement
Joule – unit of work, energy and quantity of heat in the International system of units (SI), named after the English physicist James Prescott Joule.
Joule as the unit of measurement is the Russian designation – j and international designation – J.
In classical physics, Joule equals the workdone in moving the point of application of force equal to 1 (one) Newton (N), a distance of one meter in the direction of the force.
J = N · m = kg · m2 / S2.
1 j = 1 N · 1 m = 1 kg · 1 m2 / S2 1.
Electricity Joule means the workwhich is made by electric field strength for 1 second at a voltage of 1 volt (V) to maintain the current in 1 ampere (A). It is the energy that will stand out in 1 second when a current is passed through the conductor a current of 1 ampere (A) at a voltage of 1 volt (V).
In the International system of units the Joule introduced by the decision of the XI General conference on weights and measures in 1960, simultaneously with the adoption of the SI as a whole. In accordance with the rules SI, and relating the derived units are named for scientists, the name of the unit Joule is written with a lowercase letter and its name – with a capital (j). Such writing of the designation is stored in the symbols of other derived units formed using Joule.
In joules measure work, energy and quantity of heat.
Using fundamental SI units, the Joule is expressed as follows:
J = N · m
J = kg · m2 / S2
J = W / s
J = A2 · Ω · s
J = B2 · C / Om
J = KL · In
where A is amperes, V – bolt, j – Joule, KL – pendant, m – metre N – Newton s – second W – watt, kg – kilo, of om – Om.
1 j ≈ 6,24151 ⋅ 1018 eV
1 MJ = 0,277(7) kWh
1 kWh = 3,6 MJ
1 j ≈ 0,238846 calories
1 calorie (international) = 4,1868 J.
1 kilogram-force meter (kgf·m) = 9,80665 j
1 j ≈ 0,101972 kgf·m
Multiple and sub-multiple units are formed using standard prefixes of the SI.
|101 j||decagon||DJ||daJ||10-1 J.||decidion||wad||dJ|
|102 J.||hectorol||GJ||hJ||10-2 J.||santigold||CJ||cJ|
|103 j||kilojoule||kJ||kJ||10-3 J.||millijoule||MJ||mJ|
|106 J.||megajoule||MJ||MJ||10-6 j||microjoule||µj||µJ|
|109 J.||GJ||GJ||GJ||10-9 J.||nanojoule||ICD||nJ|
|1012 J.||Terajoule||TJ||TJ||10-12 j||picojoule||PJ||pJ|
|1015 J.||petajoule||PJ||PJ||10-15 j||femtojoule||FJ||fJ|
|1018 J.||exajoule||Edge||EJ||10-18 j||attojoule||AJ||aJ|
|1021 J.||zettajoule||Zj||ZJ||10-21 J.||zeptojoule||zj||zJ|
|1024 J.||jettagolf||Ij||YJ||10-24 J.||octodiol||ij||yJ|
Muzzle energy of the bullet when fired from a Kalashnikov – 2030 joules.
The energy required to heat 1 liter of water from 20 to 100 °C, is 3.35⋅105 j.
The energy released in the explosion of 1 ton of trinitrotoluene (TNT equivalent), – to 4.184 x 109 joules.
Note: © Photo ,