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System of units

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/* Units and prefixes */

==Units and prefixes==

~~{{Main|SI base unit|SI derived unit|SI prefix}}~~The International System of Units consists of a set of units together with a set of [[SI ~~prefix|prefixes]]~~. The units are divided into two classes—'''base units''' and '''derived units'''. There are seven [[SI ~~base unit|base units]]~~, each representing, by convention, [[Dimensional analysis|different kinds of physical quantities]].

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|+ SI base units<ref name=sp330>{{Cite book|author=Barry N. Taylor & Ambler Thompson Ed. |title= The International System of Units (SI) |url=http://physics.nist.gov/Pubs/SP330/sp330.pdf |accessdate=18 June 2008|publisher=National Institute of Standards and Technology|location= Gaithersburg, MD|pages=23|year= 2008}}</ref><ref>[http://old.iupac.org/publications/books/author/mills.html Quantities Units and Symbols in Physical Chemistry], IUPAC</ref>

|-

!Unit name

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