posted by Ken .
why is the unit Kelvin (temperature unit) not called "degree Kelvin"? why only "Kelvin"?
thank you for answering.
indeed the unit is kelvin with a lower case k, although the symbol is K.
The degrees scales are so called because the interval chosen was chosen by the inventors of the degF and degC scales, and these two scales have no natural zero. What I mean by the latter is that can't say that 32 degF is half the temperature of 64 degF when comparing across the scales as 32 degF is 0 deg C and 64 deg F is 18 deg C, which is not twice 0! If they were true scales with a natural zero (like km and miles) then you would get the same ratio if you worked in km or miles.