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Comparison of temperature scales. * Normal human body temperature is 36.8 °C ±0.7 °C, or 98.2 °F ±1.3 °F. The commonly given value 98.6 °F is simply the exact conversion of the nineteenth-century German standard of 37 °C. Since it does not list an acceptable range, it could therefore be said to have excess (invalid) precision.
Scale of temperature. Scale of temperature is a methodology of calibrating the physical quantity temperature in metrology. Empirical scales measure temperature in relation to convenient and stable parameters or reference points, such as the freezing and boiling point of water. Absolute temperature is based on thermodynamic principles: using the ...
Celsius scale. ( 5 / 9 x − 273.15) °C. Fahrenheit. (x − 459.67) °F. The Rankine scale (/ ˈræŋkɪn / RANG-kin) is an absolute scale of thermodynamic temperature named after the University of Glasgow engineer and physicist Macquorn Rankine, who proposed it in 1859. [1]
Temperature is a physical quantity that quantitatively ... A more physically informative version of such a law views empirical temperature as a chart on a hotness ...
The Fahrenheit scale (/ ˈfærənhaɪt, ˈfɑːr -/) is a temperature scale based on one proposed in 1724 by the European physicist Daniel Gabriel Fahrenheit (1686–1736). [ 1 ] It uses the degree Fahrenheit (symbol: °F) as the unit. Several accounts of how he originally defined his scale exist, but the original paper suggests the lower ...
Water's boiling point is 100 °C. This definition assumes pure water at a specific pressure chosen to approximate the natural air pressure at sea level. Thus, an increment of 1 °C equals 1 100 of the temperature difference between the melting and boiling points. The same temperature interval was later used for the Kelvin scale.
The term "gas mark" was a subject of the joint BBC / OED production Balderdash and Piffle, in May 2005. The earliest printed evidence of use of "gas mark" (with no other terms between the two words) appears to date from 1958. [1] However, the manufacturers of the "New World" gas ranges in the mid-1930s gave away recipe books for use with their ...
Glass cell for Fixed point of water. The International Temperature Scale of 1990 (ITS-90) is an equipment calibration standard specified by the International Committee of Weights and Measures (CIPM) for making measurements on the Kelvin and Celsius temperature scales. It is an approximation of thermodynamic temperature that facilitates the ...
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