• taiyang@lemmy.world
    link
    fedilink
    English
    arrow-up
    0
    ·
    4 days ago

    I use this as an example for interval vs ratio; you can’t halve Celsius because it’s an interval scale where zero is arbitrary. Kelvin is ratio as it has an absolute zero-- you very much can halve it and doom near the entire planet next summer

      • LostXOR@fedia.io
        link
        fedilink
        arrow-up
        1
        ·
        4 days ago

        How so? Absolute zero is the coldest possible temperature, it’s physically impossible for an object to be colder. Saying that’s arbitrary is like saying it’s arbitrary to define 0 m/s as not moving.

        • Telodzrum@lemmy.world
          link
          fedilink
          English
          arrow-up
          0
          ·
          4 days ago

          It’s still assuming a scale. It’s actually worse because the scale is implied by context.

          • GBU_28@lemm.ee
            link
            fedilink
            English
            arrow-up
            1
            ·
            4 days ago

            Zero kelvin is very contextually useful. Put very simply it literally relates to the motion of atoms. At zero, they move zero.

          • xthexder@l.sw0.com
            link
            fedilink
            English
            arrow-up
            1
            ·
            4 days ago

            What? What context? The scale is the same as Celsius which is derived from the properties of water. And 0K is when there is absolutely no heat energy in the thing being measured. There is no context where this is not the case.

            • Telodzrum@lemmy.world
              link
              fedilink
              English
              arrow-up
              0
              ·
              4 days ago

              The one where a human is speaking in English and referring to a season and the temperature is more than significant context. I hope this helped you; it seems that you’re one of those people who lack the capacity to infer from available data.

              • xthexder@l.sw0.com
                link
                fedilink
                English
                arrow-up
                1
                ·
                edit-2
                4 days ago

                People don’t use Kelvin when referring to seasons. Sure, there’s plenty of ambiguity if someone says it’s 32° out without specifying the units, and you can infer from context, but that has nothing to do with Kelvin starting at absolute zero. Saying “degrees” immediately rules out Kelvin as a unit.

          • fallingcats@discuss.tchncs.de
            link
            fedilink
            English
            arrow-up
            0
            arrow-down
            1
            ·
            3 days ago

            The scale doesn’t matter, double is always double. No matter if expressed in 1m is half of 2m, or 3ft is half of 6ft. Same is true for temperature, als long as the zero point is fixed.

              • fallingcats@discuss.tchncs.de
                link
                fedilink
                English
                arrow-up
                0
                arrow-down
                1
                ·
                3 days ago

                Double is a scale in itself, it assumes the first thing as 1 and the second thing as 2. The are no other scales needed when I say something is double the other thing. The other thing is the scale here.