Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Tonne shopping experience:
1. Compare - without doubt the biggest advantage that the Tonne offers shoppers today is the ability to compare thousands of Tonne at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.
2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about
3. Testimonials - don't know anybody that has bought a Tonne? Wrong! If the Tonne is good the internet will let you know. Use the Internet as a friend and get testimonials before you buy.
4. Questions - Got a question about Tonne then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....
5. Reputation - Never heard of the company selling Tonne? Don't worry, no reason why you should know every company in the world, but you know someone that does! Use the internet to find out what people are saying about Tonne and build up a picture of their reputation for sales, returns, customer service, delivery etc.
6. Returns - still worried that even after all of the above your Tonne wont be what you want? Check out the returns policy. There is so much competition now that someone, somewhere is bound to offer the terms that you are comfortable with.
7. Feedback - happy with your Tonne then let people know, after all you are depending on others people input in your buying decision, so why not give a little back.
8. Security - check for the yellow padlock on the Tonne site before you buy, and the s after http:/ /i.e. https:// = a secure site
9. Contact - got a question about Tonne, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.
10. Payment - ready to pay for your Tonne, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.
A
tonne (
t) or
metric ton (
M/T), also referred to as a
metric tonne, is a measurement of mass equal to 1,000 kilograms. It is not an SI unit but is accepted for use with the SI.Section 4.1 of The International System of Units (SI), 8th Edition, 2006 The proper SI unit for a tonne would be a "megagram" (Mg, see
SI prefix), but this term is rarely used in practice. Though the spelling
tonne predates the introduction of the SI system in 1960, it is now used as the standard spelling for the metric mass measurement in English. The similar
Imperial units and United States customary units are spelled
ton in English.
This unit was defined in the United States in 1866 Act of July 28, 1866, codified in 15 U.S.C. §205 as a
millier or a
tonneau. However, neither of these are in use and though they still appear in the statute, they have been declared obsolete by
National Institute of Standards and Technology."Metric System of Measurement: Interpretation of the International System of Units for the United States",
Federal Register notice of July 28, 1998, 63 F.R. 40333
Definition
1 tonne is defined as
1000 kilograms or
1 megagram (SI prefix, kilokilogram is incorrect per CIPM, 1967: Recommendation 2http://www.bipm.org/en/CIPM/db/1967/2/)
== Multiples =={|class="wikitable"! Multiple !! Name !! Symbol|rowspan="12"|! Multiple !! Name !! Symbol|rowspan="12"|! Multiple !! Name !! Symbol|rowspan="12"|! Multiple !! Name !! Symbol|-|100 ||
tonne|| t|106 || megagram || Mg|100 ||
tonne|| t|106 || megagram || Mg|-|101 || decatonne || dat|107 ||
(none) ||
(none)|10–1 || decitonne || dt|105 ||
(none) ||
(none)|-|10² || hectotonne || ht|108 ||
(none) ||
(none)|10–2 || centitonne || ct|104 ||
(none) ||
(none)|-|10³ || kilotonne || kt|109 || gigagram || Gg|10–3 || millitonne || mt|10³ || kilogram || kg|-|106 || megatonne || Mt|1012 || teragram || Tg|10–6 || microtonne || µt|100 || gram || g|-|109 || gigatonne || Gt|1015 || petagram || Pg|10–9 || nanotonne || nt|10-3 || milligram || mg|-|1012 || teratonne || Tt|1018 || exagram || Eg|10–12 || picotonne || pt|10-6 || microgram || μg|-|1015 || petatonne || Pt|1021 || zettagram || Zg|10–15 || femtotonne || ft|10-9 || nanogram || ng|-|1018 || exatonne || Et|1024 || yottagram || Yg|10–18 || attotonne || at|10-12 || picogram || pg|-|1021 || zettatonne || Zt|1027 ||
(none) ||
(none)|10–21 || zeptotonne || zt|10-15 || femtogram || fg|-|1024 || yottatonne || Yt|1030||
(none) ||
(none)|10–24 || yoctotonne || yt|10-18 || attogram || ag|-|-|}
Origin
The spelling
tonne is from
French language. In
Old English the spelling was tunne. The various spellings and meanings (tonne, ton, tun) derive from the late
Latin tunna, "
Barrel" - a full cask about a metre high could easily weigh a tonne.
Conversions
One tonne is equivalent to:
- One megagram (exactly). Symbol SI prefix.
- This is the official SI term, but not generally used in industry, in shipping nor ly.
- 1000/0.45359237 Pound (mass) (exactly by definition), giving approximately
- 2204.622 621 848 775 807 lb (to 19 significant digits)
- 2204.622 622 lb (to ten significant digits)—an easy-to-remember figure
- 2205 lb (rough but good enough for most calculations since loading (worst case) is usually the concern of interest)
- 98.44% of a long ton
- One long ton (2240 lb) is 101.605% of a tonne.
- 110.25% of a short ton
- One short ton (2000 lb) is 90.72% of a tonne
Explanation
The official symbol is
t.
T and
mT and
mt (especially in the combination
mmt for "million metric tons" compare to Mt for megatonne) are also sometimes used, but all of these are deprecated since they conflict with internationally agreed SI symbols. T is the SI symbol for the
Tesla (unit) and m is SI prefix 'milli', meaning 1000th (though in practice fractional prefixes aren't generally used with the tonne).
Te is also sometimes used, particularly in the nuclear industry.
In France and the English-speaking countries that are predominantly metric, the spelling
tonne is widespread. However, in Britain, the ton used prior to metrication was the
long ton of 2240 pounds (approximately 1016 kg). This is so close to the tonne that many people draw little distinction and continue to use the old spelling. For example, even the Guinness Book of World Records accepts metrication without marking this by changing the spelling. For the United States,
metric ton is the name for this unit used and recommended by NIST. In the U.S. an unqualified mention of a "ton" almost invariably refers to a
short ton of 2000 lb (about 907 kg).
Like grams and kilograms, tonnes gave rise to a (now obsolete) 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.
==Use of mass as proxy for energy==
The
tonne of trinitrotoluene (TNT) is used as a proxy for energy. Prefixes are also used e.g. kilotonne, megatonne, gigatonne; especially for expressing nuclear weapon yield, based on a Fuel value of TNT of 4.184
megajoule/kilogram (or one calorie—specifically a
thermochemical calorie—per milligram). Hence, 1
kiloton TNT = 4.184
Terajoule, 1 megaton TNT = 4.184 Petajoule.
The SI unit of energy is the joule. Assuming that TNT contains 1000 small (thermochemical)
calories per gram (4.184 Joule/g), one tonne TNT is more correctly referred to as 4.184 Joule. It is usually used to describe the energy of explosions.
Metric ton in popular culture
Derived units
metric ton unitA metric ton unit (MTU) can mean 10 kg within metal (e.g. tungsten, manganese) trading, particularly within the USA. It traditionally referred to a metric ton of ore containing 1% (i.e. 10 kg) of metal.
http://www.emis.platts.com/thezone/guides/platts/metals/conversion.html
http://www.unc.edu/~rowlett/units/dictM.html
If the metal is uranium, the acronym 'MTU' is sometimes considered to be 'metric ton of uranium' i.e. 1000 kg (http://www-pub.iaea.org/MTCD/publications/PDF/rwmp-3/REFERENCE.pdf http://www.hanford.gov/rl/uploadfiles/ea/ea1319/ea1319.html, http://www.y12.doe.gov/library/acronyms/letter.php?index=M, http://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr0544/r4/ ).
See also
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| width=40 ||
|}
References
- NIST Special Publication 811, Guide for the Use of the International System of Units (SI)
'
A
tonne (
t) or
metric ton (
M/T), also referred to as a
metric tonne, is a measurement of mass equal to 1,000 kilograms. It is not an
SI unit but is accepted for use with the SI.Section 4.1 of The International System of Units (SI), 8th Edition, 2006 The proper SI unit for a tonne would be a "megagram" (Mg, see
SI prefix), but this term is rarely used in practice. Though the spelling
tonne predates the introduction of the SI system in 1960, it is now used as the standard spelling for the metric mass measurement in English. The similar
Imperial units and
United States customary units are spelled
ton in English.
This unit was defined in the United States in 1866 Act of July 28, 1866, codified in 15 U.S.C. §205 as a
millier or a
tonneau. However, neither of these are in use and though they still appear in the statute, they have been declared obsolete by
National Institute of Standards and Technology."Metric System of Measurement: Interpretation of the International System of Units for the United States", Federal Register notice of July 28, 1998, 63 F.R. 40333
Definition
1 tonne is defined as
1000 kilograms or
1 megagram (
SI prefix, kilokilogram is incorrect per CIPM, 1967: Recommendation 2http://www.bipm.org/en/CIPM/db/1967/2/)
== Multiples =={|class="wikitable"! Multiple !! Name !! Symbol|rowspan="12"|! Multiple !! Name !! Symbol|rowspan="12"|! Multiple !! Name !! Symbol|rowspan="12"|! Multiple !! Name !! Symbol|-|100 ||
tonne|| t|106 || megagram || Mg|100 ||
tonne|| t|106 || megagram || Mg|-|101 || decatonne || dat|107 ||
(none) ||
(none)|10–1 || decitonne || dt|105 ||
(none) ||
(none)|-|10² || hectotonne || ht|108 ||
(none) ||
(none)|10–2 || centitonne || ct|104 ||
(none) ||
(none)|-|10³ || kilotonne || kt|109 || gigagram || Gg|10–3 || millitonne || mt|10³ || kilogram || kg|-|106 || megatonne || Mt|1012 || teragram || Tg|10–6 || microtonne || µt|100 || gram || g|-|109 || gigatonne || Gt|1015 || petagram || Pg|10–9 || nanotonne || nt|10-3 || milligram || mg|-|1012 || teratonne || Tt|1018 || exagram || Eg|10–12 || picotonne || pt|10-6 || microgram || μg|-|1015 || petatonne || Pt|1021 || zettagram || Zg|10–15 || femtotonne || ft|10-9 || nanogram || ng|-|1018 || exatonne || Et|1024 || yottagram || Yg|10–18 || attotonne || at|10-12 || picogram || pg|-|1021 || zettatonne || Zt|1027 ||
(none) ||
(none)|10–21 || zeptotonne || zt|10-15 || femtogram || fg|-|1024 || yottatonne || Yt|1030||
(none) ||
(none)|10–24 || yoctotonne || yt|10-18 || attogram || ag|-|-|}
Origin
The spelling
tonne is from
French language. In
Old English the spelling was tunne. The various spellings and meanings (tonne, ton, tun) derive from the late
Latin tunna, "Barrel" - a full cask about a metre high could easily weigh a tonne.
Conversions
One tonne is equivalent to:
- One megagram (exactly). Symbol SI prefix.
- This is the official SI term, but not generally used in industry, in shipping nor ly.
- 1000/0.45359237 Pound (mass) (exactly by definition), giving approximately
- 2204.622 621 848 775 807 lb (to 19 significant digits)
- 2204.622 622 lb (to ten significant digits)—an easy-to-remember figure
- 2205 lb (rough but good enough for most calculations since loading (worst case) is usually the concern of interest)
- 98.44% of a long ton
- One long ton (2240 lb) is 101.605% of a tonne.
- 110.25% of a short ton
- One short ton (2000 lb) is 90.72% of a tonne
Explanation
The official symbol is
t.
T and
mT and
mt (especially in the combination
mmt for "million metric tons" compare to Mt for megatonne) are also sometimes used, but all of these are deprecated since they conflict with internationally agreed SI symbols. T is the SI symbol for the
Tesla (unit) and m is SI prefix 'milli', meaning 1000th (though in practice fractional prefixes aren't generally used with the tonne).
Te is also sometimes used, particularly in the nuclear industry.
In France and the English-speaking countries that are predominantly metric, the spelling
tonne is widespread. However, in Britain, the ton used prior to metrication was the long ton of 2240 pounds (approximately 1016 kg). This is so close to the tonne that many people draw little distinction and continue to use the old spelling. For example, even the Guinness Book of World Records accepts
metrication without marking this by changing the spelling. For the United States,
metric ton is the name for this unit used and recommended by NIST. In the U.S. an unqualified mention of a "ton" almost invariably refers to a
short ton of 2000 lb (about 907 kg).
Like grams and kilograms, tonnes gave rise to a (now obsolete) 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.
==Use of mass as proxy for energy==
The
tonne of trinitrotoluene (TNT) is used as a proxy for energy. Prefixes are also used e.g. kilotonne, megatonne, gigatonne; especially for expressing
nuclear weapon yield, based on a
Fuel value of TNT of 4.184 megajoule/
kilogram (or one
calorie—specifically a
thermochemical calorie—per
milligram). Hence, 1 kiloton TNT = 4.184
Terajoule, 1
megaton TNT = 4.184 Petajoule.
The SI unit of energy is the joule. Assuming that TNT contains 1000 small (thermochemical) calories per gram (4.184 Joule/g), one tonne TNT is more correctly referred to as 4.184
Joule. It is usually used to describe the energy of explosions.
Metric ton in popular culture
- Metric Ton is also the name of a hardcore band from Jacksonville, FL.
- Fat Bastard from the Austin Powers movies is introduced by Dr. Evil in Austin Powers: The Spy Who Shagged Me saying that he weighs a metric ton.
- In the Futurama episode A Flight to Remember it is discovered that Bender weighs a metric ton.
Derived units
metric ton unitA metric ton unit (MTU) can mean 10 kg within metal (e.g. tungsten, manganese) trading, particularly within the USA. It traditionally referred to a metric ton of ore containing 1% (i.e. 10 kg) of metal.
http://www.emis.platts.com/thezone/guides/platts/metals/conversion.html
http://www.unc.edu/~rowlett/units/dictM.html
If the metal is uranium, the acronym 'MTU' is sometimes considered to be 'metric ton of uranium' i.e. 1000 kg (http://www-pub.iaea.org/MTCD/publications/PDF/rwmp-3/REFERENCE.pdf http://www.hanford.gov/rl/uploadfiles/ea/ea1319/ea1319.html, http://www.y12.doe.gov/library/acronyms/letter.php?index=M, http://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr0544/r4/ ).
See also
{||-valign=top|
| width=40 ||
|}
References
- NIST Special Publication 811, Guide for the Use of the International System of Units (SI)
'
Tonne - Wikipedia, the free encyclopedia
A tonne (t) or metric ton, also referred to as a metric tonne or tonne métrique, is a measurement of mass equal to 1,000 kilograms, or 2204.6226 pounds.
AskOxford: tonne
tonne /tun/ • noun another term for METRIC TON. — ORIGIN French. Perform another search of the Compact Oxford English Dictionary . About this dictionary
1 Tonne F.C.
This page was produced by Alasdair Worsley. Last modified (1tonnefc@waitrose.com).
Studio Tonne
Studio Tonne are designers passionate about creating and applying imaginative outcomes to a wide range of subject matter. Our ideas span across all areas of design, and we ...
BBC NEWS | Business | Copper price nears $7,000 a tonne
The price of copper rises to nearly $7,000 a tonne on the back of strong demand and worries over supply.
BBC NEWS | Technology | One tonne 'Baby' marks its birth
The sixtieth anniversary of the birth of the first modern computer - known as Baby - is celebrated.
tonne
tonne presents & performs : more options : tonne will be performing live on saturday 8th march (8.00-9.00pm) & discussing his work on sunday 9th march
Audible Communities, Scanner+Tonne
6-8 April 10am-6pm Workstation Gallery. Audible Communities is a series of sound toy utilities that exist as stand alone applications, the interaction between sound and image being ...
tonne - Hutchinson encyclopedia article about tonne
tonne. Unit of mass. One tonne equals 1,000 kg/2,204.6 lb; equivalent to 0.9842 of an imperial ton.?
tonne - definition of tonne by the Free Online Dictionary, Thesaurus ...
A metric ton. French, from Old French, tun, from Late Latin tunna, probably of Celtic origin.
