Rankine

: Basic unit. According to the absolute temperature scale or when the measurement unit is Fahrenheit, the freezing point of water is 491.67 °, the boiling point is 671.67 °

The sign of Rankin is ° R (Ra can be distinguished from Rømer scale and Réaumur scale as needed). Both the Kelvin scale and the Rankine scale are zero, but the Rankin degree is defined to be equal to 1 degree Fahrenheit, not just once used in the Kelvin scale. The temperature of -459.67 ° F is exactly equal to 0 ° R. Several engineering fields in the United States use Rankin scale to measure thermodynamic temperature. However, in the scientific community as a whole, the thermodynamic temperature is measured using the Kelvin scale. The US National Institute of Standards and Technology does not recommend using Rankine's degree for NIST publications.

The Rankine scale (/ ræŋkɪn /) is the absolute scale of the thermodynamic temperature named after the engineer and physicist William John Macquorn Rankine at the University of Glasgow that he proposed in 1859. (The Kelvin scale was first proposed in 1848.) It can be used in Fahrenheit engineering systems for thermal calculations. The sign of Rankin is ° R (Ra can be distinguished from Rømer scale and Réaumur scale as needed). With a similar Kelvin, some authors omit the degree sign and refer to the unit as a term. Zero of the Kelvin scale and the Rankin scale are all absolute zero, but the temperature difference of Rankin degrees is defined as equal to 1 degree Fahrenheit rather than the Celsius temperature used in the Kelvin scale. Therefore, the temperature 0 K (-273.15 ° C; -459.67 ° F) is equal to 0 ° R and the temperature -458.67 ° F is equal to 1 ° R

Rankine (R or Ra distinguishes from Rømer scale and Réaumur scale) is a temperature class named after the physicist William John Macquorn Rankine (1820-1872) he proposed in 1859. Rankin scale is similar to Kelvin scale Although zero is absolute zero, the Rankin degree is defined as equal to 1 degree Fahrenheit (not as 1 degree Celsius as used in Kelvin scale). -459.67 ° F The temperature is equal to 0R