XPost: uk.media.tv.sf.drwho, alt.usage.english   
   From: doctor@doctor.nl2k.ab.ca   
      
   In article <1ro0btp.1robt3c1efztoaN%nospam@de-ster.demon.nl>,   
   J. J. Lodder  wrote:   
   >Stefan Ram  wrote:   
   >   
   >> doctor@doctor.nl2k.ab.ca (The Doctor) wrote or quoted:   
   >> >In article <1rnygoz.1e95pzz18vjp88N%nospam@de-ster.demon.nl>,   
   >> >J. J. Lodder  wrote:   
   >> . . .   
   >> >>[1] Beware, Celsius is always degrees, because Celsius is a scale.   
   >> >>'Kelvin' otoh is a unit, and writing 'degree Kelvin' is an error.   
   >>   
   >> doctor@doctor.nl2k.ab.ca (The Doctor) writes:   
   >> >Still interchangable.   
   >>   
   >>   Among people who actually know the field,   
   >   
   >Like you, for example?   
   >   
   >>   "kelvin" counts as both   
   >>   a unit and a scale. To back that up, I'm just going to quote a   
   >>   bit from the well-known online encyclopedia "Wikipedia".   
   >   
   >That's wrong, or at least confused.   
   >Something is either a scale, or a unit, but not both.   
   >If it is a unit, loosely calling it a scale   
   >is merely a continuation of obsolete terminology.   
   >   
   >This often happens in science.   
   >When a field is new, people start with empirical scales,   
   >just to quantify observations.   
   >Like for example Celsius, Beaufort, or Richter.   
   >When the field matures these scales may be replaced   
   >by numerical values in units, like kelvin, m/s or Joule.   
   >   
   >> |The kelvin (symbol: K) is the base unit for temperature in   
   >> |the International System of Units (SI). The Kelvin scale is   
   >> |an absolute temperature scale that starts at the lowest   
   >> |possible temperature (absolute zero), taken to be 0 K.   
   >> Wikipedia   
   >   
   >... is confused about it.   
   >Correct: In the SI absolute temperatures are measured in kelvin.   
   >   
   >In the case of temperatures it is easy to be confused.   
   >For other units, less so.   
   >No one in his right mind would use:   
   >'I am 500 on the kilometer scale from London',   
   >   
   >Jan   
   >   
   >--   
   >To confuse you further: As of the 2018 CGPM not only the triple point   
   >of water has been eliminated from the definition,   
   >but absolute zero no longer appears in it either.   
   >So all appearance of a scale has been eliminated.   
   >   
   >The kelvin is nowadays:   
   >The kelvin, symbol K, is the SI unit of thermodynamic temperature;   
   >its magnitude is set by fixing the numerical value   
   >of the Boltzmann constant to be equal to exactly 1.380649 * 10^-23 J/K.   
   >[joules per kelvin]. (NIST)   
   >No degree or scale in sight, it just another unit.   
   >   
   >   
   >   
   >   
   >   
   >   
      
   Kelvin starts at absolute 0 .   
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