A tonne (also called metric ton) is a non-SI unit of mass, accepted for use with SI, defined as: 1 tonne = 1000 kilogram (= 106 gram). It is approximately equal to 2,204.62262 pounds. The ''tonne'' spelling is borrowed from the French word, and is now common in English where it is rarely used for any other ton. For the United States, metric ton is the name for this unit used and recommended by NIST. [http://physics.nist.gov/Pubs/SP811/sec05.html#5.1.1] The official symbol is t, but T and mT and mt (especially in the combination mmt for "million metric tons") are also used. The tonne may also be referred to by the strictly SI term megagram, symbol Mg. Like grams and kilograms, tonnes have also given rise to a force unit of the same name: 1 tonne-force = 9.80665 newton (kN), a unit also often called simply "tonne" or "metric ton" without identifying it as a unit of force. Note that it is only the tonne as a unit of mass which is accepted for use with SI; the tonne-force or metric ton-force is not acceptable for use with SI. The megaton or tonne of Trinitrotoluene is a unit of energy with the tonne as a proxy term. This unit is not acceptable for use with SI. Assuming 1000 small (thermochemical) calories per gram (4.184 Joule/g) and thus a tonne of TNT is 4.184 GJ. kilogram « tonne/megagram « gigagram == See also == * Units using the tonne ** megaton (and kiloton) ** ton of oil equivalent ** GTOE ** A 'kilotonne' is a thousand tonnes, per SI standards. * Other tons ** short ton ** long ton ** tonnage ** ton (volume) * Conversion of units ==References== *NIST Special Publication 811, [http://physics.nist.gov/Pubs/SP811/ ''Guide for the Use of the International System of Units (SI)''] Units of mass
==word origins== :The naming of this unit was far from original because SI advocates derived the name of their unit from the already well established ton and added an '-ne' suffix to differentiate between the SI tonne and non-metric ton. The tonne is also less formally called metric ton but this name is deprecated since it mixes metric and non-metric terms. This wasn't done by "SI advocates"; the names ton and tonne existed long before there was an SI, which was only introduced in 1960. It wasn't the adding of an -ne to the English word for this distinguishing purpose. Rather, it was a direct borrowing of the French word. A French word which dates back to even before there was any metric system, let alone the modern version called the International System of Units. In French, of course, "tonne" is just as ambiguous as "ton" is in English. What do you suppose an unidentified "tonne" would have been in Quebec 50 years ago, for example? Most likely a ''tonne courte'', or 2000 English pounds, unless it was in shipping where it would likely be the ''tonne forte'' of 2240 lb. I'm no expert in French, but I think it would be a pretty safe assumption that today (though not necessarily in the past), wherever French is spoken or written, if ''tonne'' is used without any other identifying adjective, it is the ''tonne mtrique''. In English, "tonne" is somewhat less ambiguous than in French. Nonetheless, the terms "short tonne" and "long tonne" are used, rarely. Furthermore, many are careful to specifically identify the units as "metric tonnes"; Google
"metric tonne" 37,200 hits
"metric tonnes" 149,000 hits User:Gene Nygaard 14:09, 16 Dec 2004 (UTC) :To complicate matters, the French tonne also designates a large liquid container (of which the barrel, tonneau is a diminutive), more or less the equivalent of the English ''tun''. :User:Urhixidur 11:25, 2005 Jun 23 (UTC) == TNT == "ton of TNT or tonne of Trinitrotoluene is a unit of energy based on the tonne, assuming 1000 small (thermochemical) calories per gram (4.184 kJ/g) and thus a tonne of TNT is 4.184 GJ. This unit is also not acceptable for use with SI." This argument is pretty much meaningless, because those who speak (kilo)ton TNT have the nukes and so they don't need to care a damn about SI or customary units. It's hard to argue with someone who has the bomb ... :i've seen not acceptable for use with SI in various places on wikipedia. I suspect "acceptable for use with SI" has a specific technical and/or regulatory meaning can anyone confirm? ::There are three or four different classes of units which are acceptable for SI; some of those units are only "currently" (BIPM) or "temporarily" (NIST) acceptable. ::*[http://www.bipm.fr/en/si/si_brochure/chapter4/4-1.html BIPM SI brochure] ::*[http://physics.nist.gov/Pubs/SP811/sec05.html NIST Special Publication 811] :: User:Gene Nygaard 10:04, 23 Jun 2005 (UTC)
See other meanings of words starting from letter:
Words begining with Tonne:
Tonne
Tonne
Tonneau
Tonnelle_Circle
Tonnelle_Circle_Viaduct
Tonners62
Tonners62
Tonnes
Tonne
A tonne (also called metric ton) is a non-SI unit of mass, accepted for use with SI, defined as: 1 tonne = 1000 kilogram (= 106 gram). It is approximately equal to 2,204.62262 pounds. The ''tonne'' spelling is borrowed from the French word, and is now common in English where it is rarely used for any other ton. For the United States, metric ton is the name for this unit used and recommended by NIST. [http://physics.nist.gov/Pubs/SP811/sec05.html#5.1.1] The official symbol is t, but T and mT and mt (especially in the combination mmt for "million metric tons") are also used. The tonne may also be referred to by the strictly SI term megagram, symbol Mg. Like grams and kilograms, tonnes have also given rise to a force unit of the same name: 1 tonne-force = 9.80665 newton (kN), a unit also often called simply "tonne" or "metric ton" without identifying it as a unit of force. Note that it is only the tonne as a unit of mass which is accepted for use with SI; the tonne-force or metric ton-force is not acceptable for use with SI. The megaton or tonne of Trinitrotoluene is a unit of energy with the tonne as a proxy term. This unit is not acceptable for use with SI. Assuming 1000 small (thermochemical) calories per gram (4.184 Joule/g) and thus a tonne of TNT is 4.184 GJ. kilogram « tonne/megagram « gigagram == See also == * Units using the tonne ** megaton (and kiloton) ** ton of oil equivalent ** GTOE ** A 'kilotonne' is a thousand tonnes, per SI standards. * Other tons ** short ton ** long ton ** tonnage ** ton (volume) * Conversion of units ==References== *NIST Special Publication 811, [http://physics.nist.gov/Pubs/SP811/ ''Guide for the Use of the International System of Units (SI)''] Units of mass
Tonne
==word origins== :The naming of this unit was far from original because SI advocates derived the name of their unit from the already well established ton and added an '-ne' suffix to differentiate between the SI tonne and non-metric ton. The tonne is also less formally called metric ton but this name is deprecated since it mixes metric and non-metric terms. This wasn't done by "SI advocates"; the names ton and tonne existed long before there was an SI, which was only introduced in 1960. It wasn't the adding of an -ne to the English word for this distinguishing purpose. Rather, it was a direct borrowing of the French word. A French word which dates back to even before there was any metric system, let alone the modern version called the International System of Units. In French, of course, "tonne" is just as ambiguous as "ton" is in English. What do you suppose an unidentified "tonne" would have been in Quebec 50 years ago, for example? Most likely a ''tonne courte'', or 2000 English pounds, unless it was in shipping where it would likely be the ''tonne forte'' of 2240 lb. I'm no expert in French, but I think it would be a pretty safe assumption that today (though not necessarily in the past), wherever French is spoken or written, if ''tonne'' is used without any other identifying adjective, it is the ''tonne mtrique''. In English, "tonne" is somewhat less ambiguous than in French. Nonetheless, the terms "short tonne" and "long tonne" are used, rarely. Furthermore, many are careful to specifically identify the units as "metric tonnes"; Google
"metric tonne" 37,200 hits
"metric tonnes" 149,000 hits User:Gene Nygaard 14:09, 16 Dec 2004 (UTC) :To complicate matters, the French tonne also designates a large liquid container (of which the barrel, tonneau is a diminutive), more or less the equivalent of the English ''tun''. :User:Urhixidur 11:25, 2005 Jun 23 (UTC) == TNT == "ton of TNT or tonne of Trinitrotoluene is a unit of energy based on the tonne, assuming 1000 small (thermochemical) calories per gram (4.184 kJ/g) and thus a tonne of TNT is 4.184 GJ. This unit is also not acceptable for use with SI." This argument is pretty much meaningless, because those who speak (kilo)ton TNT have the nukes and so they don't need to care a damn about SI or customary units. It's hard to argue with someone who has the bomb ... :i've seen not acceptable for use with SI in various places on wikipedia. I suspect "acceptable for use with SI" has a specific technical and/or regulatory meaning can anyone confirm? ::There are three or four different classes of units which are acceptable for SI; some of those units are only "currently" (BIPM) or "temporarily" (NIST) acceptable. ::*[http://www.bipm.fr/en/si/si_brochure/chapter4/4-1.html BIPM SI brochure] ::*[http://physics.nist.gov/Pubs/SP811/sec05.html NIST Special Publication 811] :: User:Gene Nygaard 10:04, 23 Jun 2005 (UTC)
See other meanings of words starting from letter:
T
TA | TB | TC | TD | TE | TF | TG | TH | TI | TJ | TK | TL | TŁ | TM | TN | TO | TP | TR | TS | TU | TW | TX | TY | TZ |Words begining with Tonne:
Tonne
Tonne
Tonneau
Tonnelle_Circle
Tonnelle_Circle_Viaduct
Tonners62
Tonners62
Tonnes
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