Rankine scale
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The Rankine scale (Template:IPAc-en Template:Respell) is an absolute scale of thermodynamic temperature named after the University of Glasgow engineer and physicist W. J. M. Rankine, who proposed it in 1859.<ref name="Merriam-Webster"/> Similar to the Kelvin scale, which was first proposed in 1848,<ref name="Merriam-Webster">Template:Cite Merriam-Webster</ref> zero on the Rankine scale is absolute zero, but a temperature difference of one Rankine degree (°R or °Ra) is defined as equal to one Fahrenheit degree, rather than the Celsius degree used on the Kelvin scale. In converting from kelvin to degrees Rankine, Template:Convert or Template:Convert. A temperature of Template:Convert is equal to Template:Val.<ref name="SP811">Template:Cite journal</ref><ref>Template:Cite web</ref>
Usage
The Rankine scale is used in engineering systems where heat computations are done using degrees Fahrenheit.<ref name="arstechnica">Template:Cite web</ref>Template:Better citation needed
The symbol for degrees Rankine is °R<ref name="SP811" /> (or °Ra if necessary to distinguish it from the Rømer and Réaumur scales). By analogy with the SI unit kelvin, some authors term the unit Rankine, omitting the degree symbol.<ref name="dummies">Template:Cite book</ref><ref name="engineering">Template:Cite book</ref>
Some temperatures relating the Rankine scale to other temperature scales are shown in the table below.
| Scale | ||||||
|---|---|---|---|---|---|---|
| Kelvin | Rankine | Fahrenheit | Celsius | Réaumur | ||
| Temperature | Absolute zero | Template:Convert | Template:Val | |||
| Freezing point of brineTemplate:Efn | Template:Convert | Template:Val | ||||
| Freezing point of waterTemplate:Efn | Template:Convert | Template:Val | ||||
| Boiling point of waterTemplate:Efn | Template:Convert | Template:Val | ||||