SI Multiples
Submultiples | Multiples | |||||
---|---|---|---|---|---|---|
Value | Symbol | Name | Value | Symbol | Name | |
10−1 J | dJ | decijoule | 101 J | daJ | decajoule | |
10−2 J | cJ | centijoule | 102 J | hJ | hectojoule | |
10−3 J | mJ | millijoule | 103 J | kJ | kilojoule | |
10−6 J | µJ | microjoule | 106 J | MJ | megajoule | |
10−9 J | nJ | nanojoule | 109 J | GJ | gigajoule | |
10−12 J | pJ | picojoule | 1012 J | TJ | terajoule | |
10−15 J | fJ | femtojoule | 1015 J | PJ | petajoule | |
10−18 J | aJ | attojoule | 1018 J | EJ | exajoule | |
10−21 J | zJ | zeptojoule | 1021 J | ZJ | zettajoule | |
10−24 J | yJ | yoctojoule | 1024 J | YJ | yottajoule |
This SI unit is named after James Prescott Joule. As with every International System of Units (SI) unit whose name is derived from the proper name of a person, the first letter of its symbol is upper case (J). However, when an SI unit is spelled out in English, it should always begin with a lower case letter (joule), except in a situation where any word in that position would be capitalized, such as at the beginning of a sentence or in capitalized material such as a title. Note that "degree Celsius" conforms to this rule because the "d" is lowercase. —Based on The International System of Units, section 5.2.
Read more about this topic: Orders Of Magnitude (energy)
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