World: Lowest Temperature, World Meteorological Organization, ASU, retrieved March 25, 2016. Colloquially, room temperature is the range of air temperaturesthat most people prefer for indoor settings, which feel comfortable when wearing typical indoor clothing.
The difference is that, before the redefinition, the triple point of water was exact and the Boltzmann constant had a measured value of 1.38064903(51)×10−23 J/K, with a relative standard uncertainty of 3.7×10−7. 56.7°C or 134.1°F is the hottest temperature recorded on Earth at Death Valley, California on July 10, 1913, Temperature where Fahrenheit and Celsius are equal, -89°C or -129°F is the coldest temperature recorded on Earth at Vostok, Antarctica, July 1932, Ph.D., Biomedical Sciences, University of Tennessee at Knoxville, B.A., Physics and Mathematics, Hastings College. However, in hotter countries such as those near the equator room temperature can be as high as 30 °C (86 °F).
"[6], In 2005, the Comité International des Poids et Mesures (CIPM), a committee of the CGPM, affirmed that for the purposes of delineating the temperature of the triple point of water, the definition of the Kelvin thermodynamic temperature scale would refer to water having an isotopic composition specified as Vienna Standard Mean Ocean Water. Kelvin calculated that absolute zero was equivalent to −273 °C on the air thermometers of the time.
[4], In 1967/1968, Resolution 3 of the 13th CGPM renamed the unit increment of thermodynamic temperature "kelvin", symbol K, replacing "degree Kelvin", symbol °K.
In 1848, William Thomson, who was later ennobled as Lord Kelvin, wrote in his paper On an Absolute Thermometric Scale of the need for a scale whereby "infinite cold" (absolute zero) was the scale's null point, and which used the degree Celsius for its unit increment. The Unicode standard recommends using U+004B K LATIN CAPITAL LETTER K instead; that is, a normal capital K. "Three letterlike symbols have been given canonical equivalence to regular letters: U+2126 Ω OHM SIGN, U+212A K KELVIN SIGN, and U+212B Å ANGSTROM SIGN.
The kelvin is the base unit of temperature in the International System of Units (SI), having the unit symbol K. It is named after the Belfast-born Glasgow University engineer and physicist William Thomson, 1st Baron Kelvin (1824–1907).. Before the 13th CGPM, the plural form was "degrees absolute". [10][11] (The style guide for CERN, however, specifically says to always use "kelvin", even when plural.)[12]. The 13th CGPM changed the unit name to simply "kelvin" (symbol: K). Room Temperature Definition .
[17] Afterward, the Boltzmann constant is exact and the uncertainty is transferred to the triple point of water, which is now 273.1600(1) K. The kelvin is often used as a measure of the colour temperature of light sources.
A comfortable room temperature depends on individual needs and other factors. Remember to report Celsius and Fahrenheit values in degrees. For scientific work, room temperature is taken to be in the range 20 to 25 °C (68–77 °F; 293–298 K; 528–537 °R) with an average of 23 °C (73 °F; 296 K; 533 °R).
Unlike the degree Fahrenheit and degree Celsius, the kelvin is not referred to or written as a degree. In all three instances, the regular letter should be used. Fahrenheit involves a bit of multiplication, but it's nothing you can't handle. It uses absolute zero as its null point.
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