• Beacon@fedia.io
    link
    fedilink
    arrow-up
    1
    arrow-down
    2
    ·
    2 months ago

    Fahrenheit is best for ambient temperatures. 0 F is what humans feel is a very cold day, and 100 F is what humans feel is a very hot day.

    Celsius is best for literally everything else, but for humans feeling of ambient temperature Fahrenheit is best

          • KillingTimeItself@lemmy.dbzer0.com
            link
            fedilink
            English
            arrow-up
            1
            ·
            2 months ago

            yeah, and it seems to me like they’re the wrong ones here, because i can think about things in celsius perfectly fine without my worldview imploding, in fact i can pretty accurately estimate temperature conversions even.

            Like it’s great that you guys don’t have to use it, but please think about it a little bit harder before saying something really goofy that can be explained easily. Or just like, shitpost.

      • alcoholicorn@lemmy.ml
        link
        fedilink
        English
        arrow-up
        0
        arrow-down
        1
        ·
        edit-2
        2 months ago

        100F was defined as the human body temperature (The guy they used had a cold or something so it’s off by a degree and a half.)

        That’s useful for perception of heat. When the dry bulb gets above 100F, wind only cools you down by sweat evaporation, and when the wet bulb gets above 100F, even that can’t cool you down, and you will die if you don’t get to a cooler or drier environment.

        This is more intuitive than 36.5C.

          • alcoholicorn@lemmy.ml
            link
            fedilink
            English
            arrow-up
            1
            ·
            edit-2
            2 months ago

            Dry bulb is the temperature independent of humidity. Wet bulb is has a wet cloth on the thermometer bulb. This simulates how much sweat cools you in the current humidity and wind.

            Measuring humidity instead and cross-referencing to get heat index is more common these days, but IMO it’s worse. 120 in the desert vs 120 heat index due to humidity is the difference between someone using a hair dryer on your face and getting cooked in a steam room, and it doesn’t consider wind and cloud cover.

          • Voyajer@lemmy.world
            link
            fedilink
            English
            arrow-up
            1
            ·
            2 months ago

            Dry bulb is a normal temperature reading with say a thermometer. Wet bulb is that same thermometer but it is wrapped in a wet cloth to simulate evaporation of sweat.

            The purpose of wet bulb temperature measurement is to fix the dangerous temperature threshold at body temperature instead of having to adjust for humidity. So if the wet bulb temperature crosses 35C/95F you know that it is dangerous to even be outside because your sweat can’t even evaporate enough to prevent you from overheating just standing in the shade.

      • Lizardking27@lemmy.world
        link
        fedilink
        English
        arrow-up
        0
        arrow-down
        2
        ·
        2 months ago

        Um. No.

        If I said a movie was a 7/10, you would understand what that means because it’s a scale. You don’t have to “grow up” using a 0-10 scale to understand it.

        Like if I asked you to rate something on a scale of 4-17, you’d understand what I mean. The numbers are different but the concept of a scale remains the same.

        • absGeekNZ@lemmy.nz
          link
          fedilink
          English
          arrow-up
          0
          ·
          edit-2
          2 months ago

          Really not. Basically, you just need to peg feelings to a number, just like you are doing.

          Celsius:
          below -20 = deadly even with good gear, you can’t spend long here
          -15 = very dangerous / deadly
          -10 = starting to get dangerous
          -5 = starting to get uncomfortable
          0 = very cold
          5 = cold
          10 = a little cold
          15 = cool
          20 = nice
          25 = warm
          30 = hot
          35 = starting to get uncomfortable
          40 = starting to get dangerous
          45 = very dangerous / deadly
          50+ = deadly even with good gear, you can’t spend long here

          • Lizardking27@lemmy.world
            link
            fedilink
            English
            arrow-up
            0
            ·
            2 months ago

            I don’t think you understand what I said.

            Also, that’s a lot of explaining, and lots of feelings associated with arbitrary numbers. Fahrenheit doesn’t need anywhere near that level of explanation. It doesn’t necessitate the pegging of feelings to random numbers.

            The sentence “Fahrenheit is a 0-100 scale of how hot it is outside” is all anyone needs to immediately understand and be able to use fahrenheit. I didn’t need to type out a long list of what each temperature value means to me. There is no need for a mneumonic such as “10 is cold, 20s not, 30s warm, and 40s hot”

            If you’re doing math in a lab, absolutely use Celsius. I’m not saying it doesn’t have a place. It’s just not the be-all end-all most perfectest temperature measurement system ever.

            • absGeekNZ@lemmy.nz
              link
              fedilink
              English
              arrow-up
              0
              ·
              edit-2
              2 months ago

              I think you are projecting your feeling onto others; I don’t have “a mneumonic” in my head. That was for your benefit, since you are not immersed in that scale.

              When I see the weather report and it says tomorrow it is going to be 25 degrees with light wind, I know that it will be a pleasant day. The same way I know what the reporter is saying, I have been immersed in the English language since birth, it requires no though to understand the words they are saying.

              It requires no thought to understand that 25 degrees and light wind is a nice day. It just is.

              I don’t have that intuitive sense for the F scale, I always have to convert it to a sensible number. I know 100 is around 37, which is really hot.

              • Lizardking27@lemmy.world
                link
                fedilink
                English
                arrow-up
                0
                ·
                2 months ago

                But it requires you to be familiar with an arbitrary -20 - 40 scale. Which makes way less sense than a 0-100 scale.

                I don’t need to use the mnemonic either, I grew up in the U.S. so I understand both systems perfectly well. But the mnemonic exists because Celsius uses an inherently less sensible scale. You only understand it internally because you grew up with it. A person who grew up with neither system would find fahrenheit easier to understand from an unbiased position because it’s more logical.

                • absGeekNZ@lemmy.nz
                  link
                  fedilink
                  English
                  arrow-up
                  0
                  ·
                  2 months ago

                  deg C is no more arbitrary than deg F; any more than French is more arbitrary than English.

                  It is a strange argument to say “You only understand it internally because you grew up with it.”; well yes, but that is exactly the same with the deg F scale.

                  A person who grew up with neither system would find fahrenheit easier to understand from an unbiased position because it’s more logical.

                  In your opinion.

                  In my opinion it is far more logical to base you temperature scale on repeatable physical measurements, than say what a person feels.

                  0 C = water freezes
                  0 F =

                  Several accounts of how he originally defined his scale exist, but the original paper suggests the lower defining point, 0 °F, was established as the freezing temperature of a solution of brine made from a mixture of water, ice, and ammonium chloride (a salt)

                  100 C = water boils
                  100 F = best estimate for average human body temperature.

                  The F scale is not built on logic.

                  • Lizardking27@lemmy.world
                    link
                    fedilink
                    English
                    arrow-up
                    0
                    ·
                    2 months ago

                    Okay yeah you’re totally right Celsius is the most perfectest and wonderful system of temperature measurement and it can do everything and it’s magical and perfect for every single application ever.

                    Sure, bud.

                    Also “repeatable physical measurements” I think I found your problem. You seem to think that a fahrenheit thermometer will display a different temperature each time something is measured, even if the temperature has not changed. Allow me to clarify for you: if you measure something at a constant temperature more than once with a fahrenheit thermometer, the thermometer will display the same value each time, just like Celsius. I can see how that misconception could’ve led to your confusion, I’m glad I could help you to understand better. Let me know if you need anything else explained to you.

        • lime!@feddit.nu
          link
          fedilink
          English
          arrow-up
          0
          ·
          2 months ago

          if I knew that you are a european and you told me a movie was 5/10, i would assume it was average. if i knew you were American, i would assume it was dogshit.

          Americans have a weird relationship with numbers.

          also, as mentioned in another post: if 0 is too cold and 100 is too hot, surely 50 would be a pleasant temperature?

          • Lizardking27@lemmy.world
            link
            fedilink
            English
            arrow-up
            0
            arrow-down
            1
            ·
            2 months ago

            “Americans” ah, I see. You don’t actually care about effective systems of measurement, you just want to shit on people that are different from you.

            Also, as answered in another post: Why would you assume that humans, an endothermic species, prefers exactly 50% thermal energy? Of course we sit around the 70F region, we’re warm-blooded mammals. We don’t want to be half cold, we want to be mostly warm.

            No matter how much you complain or argue, it’s never going to be true that Celsius is the one-and-only most perfect system of temperature measurement. The fact is that both systems have their applications, as any intelligent member of the scientific community would tell you.

            Get over it.