Rankineova ljestvica je termodinamički (apsolutna) temperaturna ljestvica nazvana po škotskom inženjeru i fizičaru Williamu Johnu Macquornu Rankineu, koji ju je predložio 1859. godine.
Simbol za Rankineov stupanj je °R[1] (ili Ra ako je potrebno kako bi se razlikovao od Rømerove i Réaumurove). Nula na Rankineovoj ljestvici je, kao i na Kelvinovoj ljestvici, je apsolutna nula, a Rankineov stupanj je jednak Fahrenheitovom stupnju. Temperatura od −459.67 °F je jednaka 0 °R. Veza između Fahrenheitove i Rankinevoe ljestvice je:
[R] = [° F] + 459,67
Nekoliko inženjerskih polja u SAD-u mjeri termodinamička temperatura koristeći Rankineovu ljestvicu.[2] Međutim, danas se u znanstvenom svijetu, pa i u SAD-u ipak najviše koristi kelvin.[2] Američki National Institute of Standards and Technology ne preporuča korištenje Rankineovog stupnja u NIST publikacijama.[1]
Tablica pretvorbe između jedinica za temperaturu
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Izvori
- ↑ 1,0 1,1 B.8 Factors for Units Listed Alphabetically from Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 edition, Ambler Thompson and Barry N. Taylor
- ↑ 2,0 2,1 http://www.physorg.com/tags/temperature/