!!TOP!! Tonne Software Meter Serial Number

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The BIPM symbol for the tonne is t, adopted at the same time as the unit in 1879.[1] Its use is also official for the metric ton in the United States, having been adopted by the United States National Institute of Standards and Technology (NIST).[2][3] It is a symbol, not an abbreviation, and should not be followed by a period. Use of minuscule letter case is significant, and use of other letter combinations can lead to ambiguity. For example, T, MT, mT, are the SI symbols for the tesla, megatesla, and millitesla, respectively, while Mt and mt are SI-compatible symbols for the megatonne (one teragram) and millitonne (one kilogram). If describing TNT equivalent units of energy, one megatonne of TNT is equivalent to approximately 4.184 petajoules.


In English, 
tonne
 is an established spelling alternative to 
metric ton
.[4] In the United States and United Kingdom, tonne is usually pronounced the same as ton (/tʌn/), but the final "e" can also be pronounced, i.e. "
tunnie
" (/ˈtʌni/).[5] In Australia, the common and recommended pronunciation is /tɒn/.[6][7] In the United States, 
metric ton
 is the name for this unit used and recommended by NIST;[2] an unqualified mention of a 
ton
 almost invariably refers to a short ton of 2000 pounds (907 kg) and to a lesser extent to a long ton of 2240 pounds (1020 kg), with the term 
tonne
 rarely used in speech or writing. Both terms are acceptable in Canadian usage.



Ton
 and 
tonne
 are both derived from a Germanic word in general use in the North Sea area since the Middle Ages (cf. Old English and Old Frisian 
tunne
, Old High German and Medieval Latin tunna
, German and French 
tonne
) to designate a large cask, or 
tun
.[8] A full tun, standing about a metre high, could easily weigh a tonne.


The spelling 
tonne
 pre-dates the introduction of the SI in 1960; it has been used with this meaning in France since 1842,[9] when there were no metric prefixes for multiples of 106 and above, and is now used as the standard spelling for the metric mass measurement in most English-speaking countries.[10][11][12][13] In the United States, the unit was originally referred to using the French words 
millier
 or 
tonneau
,[14] but these terms are now obsolete.[15] The British imperial and United States customary units comparable to the tonne are both spelled 
ton
 in English, though they differ in mass.


As a non-SI unit, the use of SI metric prefixes with the tonne does not fall within the SI standard. For multiples of the tonne, it is more usual to speak of thousands or millions of tonnes. Kilotonne, megatonne, and gigatonne are more usually used for the energy of nuclear explosions and other events in equivalent mass of TNT, often loosely as approximate figures. When used in this context, there is little need to distinguish between metric and other tons, and the unit is spelled either as 
ton
 or 
tonne
 with the relevant prefix attached.[21]


Tungsten concentrates are usually traded in metric tonne units (originally designating one tonne of ore containing 1% of WO3, today used to measure WO3 quantities in 10 kg units. One metric tonne unit (mtu) of tungsten (VI) contains 7.93 kilograms of tungsten.


The 
tonne of trinitrotoluene (TNT)
 is used as a proxy for energy, usually of explosions (TNT is a common high explosive). Prefixes are used: kiloton(ne), megaton(ne), gigaton(ne), especially for expressing nuclear weapon yield, based on a specific combustion energy of TNT of about 4.2 MJ/kg (or one thermochemical calorie per milligram). Hence, 1 t TNT = approx. 4.2 GJ, 1 kt TNT = approx. 4.2 TJ, 1 Mt TNT = approx. 4.2 PJ.





In the petroleum industry the tonne of oil equivalent (toe) is a unit of energy: the amount of energy released by burning one tonne of crude oil, appr

!!TOP!! Tonne Software Meter Serial Number

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