What is a Rankine (unit)
The Rankine is a unit of measurement of temperature
The Rankine (°R) thermometric scale is named after Scottish engineer and physicist William J.M. Rankine (5 July 1820 — 24 December 1872). The unit of measurement of shis scale is equal to one Fahrenheit degree. This scale confirms to the following characteristics under the standard atmospheric pressure: (1) the boiling point of water is at 671.67 degrees; (2) the freezing point of water is at 491.67 degrees; (3) the zero point is an absolute zero, i.e. this scale does not have any temperature below zero.