Joule (J) – one of the units of measure approved in the SI system. Work, energy and amount of heat is measured in joules. One joule is equal to one newton increased by meter or the watt increased by a second or the kilogram increased by square meter and divided into second in a square.
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Instruction
1. It is easy to transfer unit of work and energy accepted in the SGS system to joules – erg. For this purpose it is enough to increase quantity of erg by 10 in minus of the seventh degree. So, for example 500 erg can be presented in the form 500 x 0.0000001 = 0.00005 J.
2. Also it is possible to transfer the data specified in electronvolts (ev) to joules – stand-alone energy unit. However, the result will turn out not exact and approximate. One electronvolt is approximately equal 1.6 on 10 in minus of the nineteenth degree J. Tak, 180000 ev it is possible to transfer to joules as follows: 180000 x 1.6 x 10 in minus of the nineteenth degree = 288 x 10 in minus of the thirteenth degree of J.
3. Besides, it is possible to transfer work or energy as which units of measure the kilowatt-hour (kWh) was chosen to joules. For this purpose the number of kWh needs to be increased by 3600000. For example, 0.04 kWh = 144000 J = 144 kilojoules (kJ). The result of such translation will be not approximate, but absolutely exact.
4. One more stand-alone unit which is easily transferred to joules is the calorie (kcal). For this purpose the number of calories needs to be increased by 4.1868. So, 815 kcal = 815 x 4.1868 = 3412.242 J. Takzhe exist special unit – thermochemical calorie. One thermochemical calorie is equal to 4.1840 J. Sledovatelno, 23 thermochemical calories =23 x 4.1840 = 96.232 J.
5. It is also possible to transform a number of units used in the British measuring system to joules. For example, one British thermal unit (BTE, BTU) is approximately equal 1055.056 J. Tak, 0.2 BTE = 0.2 x 1055.056 = 211.0112 J. Perevesti in these joules and other units are possible by means of any of a set of online converters.