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Tonne

The tonne () ( non-preferred SI derived unit; SI symbol: t), commonly referred to as the metric ton in the United States, is a non-SI metric unit of mass equal to 1,000  kilograms; Weights and Measures Act 1985. National Archives (London), 2014. Accessed 13 Aug 2014. Table 6 . BIPM. Retrieved on 2011-07-10. The International System of Units (SI) (PDF), 8th Edition, 2006, Section 4.1 or one megagram (Mg); it is equivalent to approximately pounds, or 0.984 long tons (imperial). Although not part of the SI per se, the tonne is " accepted for use with" SI units and prefixes by the International Committee for Weights and Measures, along with several other units like the bar, litre and day.https://www.nist.gov/pml/pubs/sp811/appenb8.cfm#T

Symbol and abbreviations

The SI symbol for the tonne is "t", adopted at the same time as the unit itself in 1879. Its use is also official for the metric ton in the United States, having been adopted by the US National Institute of Standards and Technology. It is a symbol, not an abbreviation, and should not be followed by a period. Informal and non-approved symbols or abbreviations include "T", "mT", "MT", and "mt".
"green air" © 2007 - Ingo Malchow, Webdesign Neustrelitz
This article based upon the http://en.wikipedia.org/wiki/tonne, the free encyclopaedia Wikipedia and is licensed under the GNU Free Documentation License.
Further informations available on the list of authors and history: http://en.wikipedia.org/w/index.php?title=tonne&action=history
presented by: Ingo Malchow, Mirower Bogen 22, 17235 Neustrelitz, Germany