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Rankine scale
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The Rankine scale ( ) is an of thermodynamic temperature named after the University of Glasgow and W. J. M. Rankine, who proposed it in 1859. Similar to the , which was first proposed in 1848, zero on the Rankine scale is , but a temperature difference of one Rankine degree (°R or °Ra) is defined as equal to one degree, rather than the degree used on the Kelvin scale. In converting from kelvin to degrees Rankine, 1 ˚R =  K or  K = 1.8 ˚R. A temperature of 0 K (−273.15 °C; −459.67 °F) is equal to 0 °R. B.8 Factors for Units Listed Alphabetically from


Usage
The Rankine scale is used in engineering systems where heat computations are done using degrees Fahrenheit.

The symbol for degrees Rankine is °R (or °Ra if necessary to distinguish it from the Rømer and Réaumur scales). By analogy with the SI unit , some authors term the unit Rankine, omitting the degree symbol.

Some temperatures relating the Rankine scale to other temperature scales are shown in the table below.


See also
  • Outline of metrology and measurement
  • Comparison of temperature scales


Notes

Bibliography


External links
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