Ezra asked in USMA 18486: >I thought the correct terminology was "kelvins" in the plural. Can you tell >me if that's correct?
Quite right. The 13th CGPM, 1967-1968, in Resolution 3 decided to change the name "degree Kelvin" to "kelvin", symbol "K". I presume that the reason the CGPM did not decide at the same time to change the name of "degree Celsius" to "celsius" was that the "degree Celsius" was in common use around the world, while "kelvin" is used only by scientists and technologists who are more adaptable than the general public. The same reasoning applies to the question of a new name for the kilogram, which is the only SI base unit with a prefix in its name. Joseph B.Reid 17 Glebe Road West Toronto M5P 1C8 TEL. 416-486-6071
