• 🐋 Color 🔱 ♀@lemm.ee
    link
    fedilink
    English
    arrow-up
    150
    ·
    11 days ago

    30°C is 303 Kelvin. Half of that is 151 Kelvin, which translates into a fairly mild -122°C!

    Takes out hockey stick

      • MisterFrog@lemmy.world
        link
        fedilink
        English
        arrow-up
        2
        ·
        10 days ago

        I would be willing to bet there are more people in the US using Kelvin in their jobs than Rankine.

        Lb-mole? That one I’m not sure.

        To me, these wanna-be scientific units are weird, like, just use metric at that point 😅

        Also 1000th of an inch. Like, come on! You’re just teasing us

      • mipadaitu@lemmy.world
        link
        fedilink
        English
        arrow-up
        4
        ·
        11 days ago

        That’s one of the ways proposed for terraforming Venus. Put in a sun shield to freeze the planet, let the CO2 snow down, then process the CO2 into something that can sequester it away so it doesn’t just go back into the atmosphere after removing the sun shield.

        Of course none of that is technically possible right now, but it’s a lot easier on a planet that has no (known) life to destroy while working through the process.

  • RustyNova@lemmy.world
    link
    fedilink
    English
    arrow-up
    41
    ·
    edit-2
    11 days ago

    Granted. Celsius now range from 0 to 50

    Edit: … or whatever unit you prefer. It’s still the same

  • Zerthax@reddthat.com
    link
    fedilink
    English
    arrow-up
    28
    ·
    11 days ago

    Reminds me of a time one of my friends was happy that it was going to warm up and said something like “it’s going to be twice as warm tomorrow”. It was going from maybe 20F to 40F or something.

    That led to an interesting discussion.

  • frezik@midwest.social
    link
    fedilink
    English
    arrow-up
    26
    ·
    11 days ago

    This knowledge comes in handy with marketing BS around CPU coolers. If an aftermarket cooler gets a CPU to 35C when the stock cooler is at 70C, marketing will sometimes claim it cut temperatures in half.

      • fallingcats@discuss.tchncs.de
        link
        fedilink
        English
        arrow-up
        3
        ·
        edit-2
        10 days ago

        That’s not how it works, an “idle” CPU is already generating a not insignificant amount of heat. That why you measure the difference against ambiant air if you’re at all serious about it.

        • neatchee@lemmy.world
          link
          fedilink
          English
          arrow-up
          1
          ·
          10 days ago

          For anyone questioning this logic, try running your “idle” CPU without a heatsink of any kind.

  • taiyang@lemmy.world
    link
    fedilink
    English
    arrow-up
    23
    ·
    11 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

    • Ultraviolet@lemmy.world
      link
      fedilink
      English
      arrow-up
      3
      ·
      edit-2
      10 days ago

      90 F to Kelvin, halved and converted back, is approximately -190.

      It’s difficult to find data on what exposure to that temperature would do, the threshold for an extreme cold warning (meaning absolutely do not go outside without heavy protection unless you want necrotic frostbite) is about 150 F warmer than that.

      • ✺roguetrick✺@lemmy.world
        link
        fedilink
        English
        arrow-up
        2
        ·
        10 days ago

        It depends on conductive and convective transfer at that point. The atmosphere would be vastly different as that’s well below the point where CO2 would snow out but you should still have enough gasses to flash freeze you.

        • not_woody_shaw@lemmy.world
          link
          fedilink
          English
          arrow-up
          5
          ·
          11 days ago

          It’s a room made from platinum-iridium, and kept in a triple-locked vault at the International Bureau of Weights and Measures in France.

          • grozzle@lemm.ee
            link
            fedilink
            English
            arrow-up
            3
            ·
            11 days ago

            unfortunately, opening the door changes the temperature, so in practice instruments are calibrated from copies of the room built at other metrology institutions around the world.

    • hsdkfr734r@feddit.nl
      link
      fedilink
      English
      arrow-up
      1
      ·
      11 days ago

      The indoor temperature is always at room temperature and vice versa. It’s not constant though.