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A ton of TNT or tonne of TNT is a unit of energy equal to 10 9 (thermochemical) calories, also known as a gigacalorie (Gcal), equal to 4.184 gigajoules (GJ). A kiloton of TNT or kilotonne of TNT is a unit of energy equal to 10 12 calories, also known as a teracalorie (Tcal), equal to 4.184 terajoules (TJ).
The tonne (/ t ʌ n / ⓘ or / t ɒ n /; symbol: t) is a unit of mass equal to 1,000 kilograms.It is a non-SI unit accepted for use with SI.It is also referred to as a metric ton in the United States to distinguish it from the non-metric units of the short ton (United States customary units) and the long ton (British imperial units).
The tonne (t) is an SI-compatible unit of mass equal to a megagram (Mg), or 10 3 kg. The unit is in common use for masses above about 10 3 kg and is often used with SI prefixes. For example, a gigagram ( Gg ) or 10 9 g is 10 3 tonnes, commonly called a kilotonne .
1795: the gram (1 / 1000 of a kilogram) was provisionally defined as the mass of one cubic centimetre of water at the melting point of ice. [12] 1799: The Kilogramme des Archives was manufactured as a prototype. It had a mass equal to the mass of 1 dm 3 of water at the temperature of its maximum density, which is approximately 4 °C. [13]
It is the rate of heat transfer needed to freeze 1 short ton (907 kg) of water into ice in 24 hours. In the United States and Canada, the R-value that describes the performance of thermal insulation is typically quoted in square foot degree Fahrenheit hours per British thermal unit (ft 2 ⋅°F⋅h/Btu).
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1.12 short tons (exactly) The long ton , [ 1 ] also known as the imperial ton or displacement ton , [ 1 ] [ 2 ] is a measurement unit equal to 2,240 pounds (1,016.0 kg). It is the name for the unit called the " ton " in the avoirdupois system of weights or Imperial system of measurements.
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