Comment on Burning Up

• phobiac@lemmy.world ⁨1⁩ ⁨week⁩ ago

  It makes no sense because that’s not what the 0 of the Fahrenheit scale is. The 0 point is the coldest an ammonium chloride brine mixture can be cooled to. The 90 point was an estimated average for human body temperature (it was adjusted up over time). These were chosen because the goal of the scale was to provide a way for people to have a defined temperature scale with a range and degree size that could be reliably reproduced without passing around standardized tools. 100 is really hot because human bodies were used as a reference for the high end, but the low end has nothing to do with the human body.

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  • psud@aussie.zone ⁨4⁩ ⁨days⁩ ago

    an ammonium chloride brine

    At what molar concentration? Was it just as much NH4Cl as he could dissolve at ambient temperature and pressure?

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    • phobiac@lemmy.world ⁨3⁩ ⁨days⁩ ago

      As I understand it, yes it was a saturated solution.

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  • Swedneck@discuss.tchncs.de ⁨1⁩ ⁨week⁩ ago

    but like isn’t that the whole point of celsius? all you need to calibrate a C thermometer is some water: when it starts freezing it’s 0°C and when it’s boiling it’s 100°C, super simple and accessible.

    It’s not like “the estimated average human body temperature” is particularly accurate, and surely no matter what you mix into water it won’t magically boil at the same temperature regardless of air pressure?

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    • phobiac@lemmy.world ⁨1⁩ ⁨week⁩ ago

      You’re totally correct that Celsius is the more sensible scale with easier to replicate reference points (when using water). It was also invented almost 30 years after the Fahrenheit scale and with all the insights gained from that period of technological advancement. In fact in the modern day the Celsius degree size is defined in reference to the Boltzmann constant since Celsius is essentially the Kelvin scale with the numbers moved around.

      It also used 100 as the freezing point of water and 0 as the boiling point when originally proposed, which changed after Anders Celsius died because everyone knew that was a weird way to do it.

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  • Rivalarrival@lemmy.today ⁨1⁩ ⁨week⁩ ago

    Geometric construction plays a role in there as well: the 180 degrees between the boiling point and the freezing point of water was not accidental.

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• KillingTimeItself@lemmy.dbzer0.com ⁨1⁩ ⁨week⁩ ago

  0f is pretty fucking cold outside, your nose hairs start to freeze in this weather. It’s genuinely uncomfortable and you can die pretty easily if you aren’t prepared for it. 100f is similar, anything over 100f and you start to get into straight heat exhaustion and potential heat stroke region of danger. it’s really not that bad? Sure if you’re like, standing outside doing nothing in the shade, you’ll be fine, but do some labor and you might meet the fabled heat exhaustion fairy.

  Obviously, when you convert it to celsius, it seems really fucking weird, That’s pretty normal for conversions though. Like just to be clear, if you round these numbers, they make more sense. -20 c and “damn it’s really cold out” you round up to 40c and “damn it’s really hot out”

  also im not really sure what you’re trying to say, but 0f isn’t like, going to kill you kill you, it’s not pleasant, but in the right attire you’ll be fine. -20 f and you start getting closer, -40f and you really start having to think about it. Are you aussie or something? This scale seems really shifted up to me. “nuts sticking weather” is like 80f and humid here.

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  • overcast5348@lemmy.world ⁨1⁩ ⁨week⁩ ago

    I’m saying that 0F is waaaaaaay more dangerous than 100F so the logic of those particular temperatures being the 0-100 ends of the scale can’t be explained by how dangerous they each are.

    Almost everyone would be fine staying outside for 30 minutes at 100F without no external help (shade, cool drinks etc). Almost nobody would be fine after staying outside at 0F without external help (parka, thermals etc).

    To me, with absolutely no data, it feels lie:

    • 0F is as dangerous as 140F (you’re long dead if you’re outside in both cases)
    • 100F is as dangerous as 40F (mildly uncomfortable but safe for a while)

    So calling 0F and 100F both “really dangerous” and using that to justify them being the respective points of 0 and 100 disingenuous. Like, use Fahrenheit if that’s what you’re used to - I use it too because that’s what I’m used to. But I don’t explain the insane system with “it’s because the two ends are reallllly dangerous.”

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    • KillingTimeItself@lemmy.dbzer0.com ⁨1⁩ ⁨week⁩ ago

      I’m saying that 0F is waaaaaaay more dangerous than 100F so the logic of those particular temperatures being the 0-100 ends of the scale can’t be explained by how dangerous they each are.

      idk about that though, i mean maybe if you go outside completely naked, sure. But idk who would be doing that. I’ve regularly been outside in close to 0f temperature in lighter clothing, it’s not pleasant, but im not going to freeze to death within twenty minutes. Plus you can also do physical activity, and as long as you regulate sweat, you’ll be fine. Although sweat can be particularly dangerous in colder weather.

      Almost everyone would be fine staying outside for 30 minutes at 100F without no external help (shade, cool drinks etc). Almost nobody would be fine after staying outside at 0F without external help (parka, thermals etc).

      i think that’s unreasonable though, you just wouldn’t be going outside at all in those clothes, in the same way that you wouldn’t go outside in 100f weather in a full winter get up. You would literally die.

      140f as a relative measure is wild to me, in 140f if you’re outside without an air conditioned vehicle (death valley) and you don’t have water you will die within about a day. 100-130f is considered “extreme heat” in death valley, which has a website that you can pull up for some relevant information. Once your body is over about 110f internal temperature, you’re fucking dead. Unless you have a way to either redirect sunlight from hitting you, and water to replenish that lost from sweat, you die really quickly.

      0f isn’t considered “extreme cold” that would be something like -40c (or f, they’re the same) where basically everything starts to freeze, and i’ve seen people do overnight camping in that weather. It’s perfectly doable, obviously not without gear, but who isn’t bringing gear? Hell you can bring a space blanket with you, with the right gear you can easily exist in 0f weather for a prolonged period.

      I’m not sure where you’re quoting the “really dangerous” from because i just said both of them are “really hot/cold”

      But I don’t explain the insane system with “it’s because the two ends are reallllly dangerous.”

      did i say this anywhere??? I feel like i’m schizophrenic.

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• C126@sh.itjust.works ⁨1⁩ ⁨week⁩ ago

  Thank you. That argument bugs the heck out of me.

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  • KillingTimeItself@lemmy.dbzer0.com ⁨1⁩ ⁨week⁩ ago

    maybe it’s a climate thing? Where do you live, here in ameica it’s quite literally the best way to describe it. We see swings below 0f at the coldest parts of the year, and upwards of 100+ in the hottest parts of the year.

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    • C126@sh.itjust.works ⁨1⁩ ⁨week⁩ ago

      So why not make the temperature go to the hottest? Let me guess, 0 isn’t the coldest either in America, right? It’s just so arbitrary, and pure cope to say it’s the best way to describe temperature.

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      • psud@aussie.zone ⁨4⁩ ⁨days⁩ ago

        The records are -80°F and 134°F

        That’s quite an error in a “whole human experience in zero to one hundred” system

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      • Rivalarrival@lemmy.today ⁨1⁩ ⁨week⁩ ago

        It’s just so arbitrary

        All of them are. The decision to use water at all is completely arbitrary. Even Kelvin and Rankine are completely arbitrary: the “width” of the degrees is not defined by a physical factor, but relative to an entirely arbitrary concept.

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      • KillingTimeItself@lemmy.dbzer0.com ⁨1⁩ ⁨week⁩ ago

        why not make it more arbitrary? Why not leave metric rules and use something like twelve that has fractions? Because it’s nice. It’s pleasing having it be 0f and 100f, it’s a clean range, and it’s also pretty comprehensive in terms of the temperature variance.

        It just happens to work out pretty nicely.

        You’re literally just applying the anti-thesis of the metric system to the question, and asking me why we don’t do it that way, idk what you’re expecting me to say here.

        do celsius users not consider something like -20c to be “pretty cold” and 40c to be “pretty hot” That’s equally as arbitrary.

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• Rivalarrival@lemmy.today ⁨1⁩ ⁨week⁩ ago

  Every time a heat wave brings 100F, the news starts reporting about old people dying. Every time the temperatures reach zero, same thing.

  Personally, I can handle the cold much easier than the heat. I get stupid-brain working more than 30 minutes at 95F. Another 15 minutes and I can’t catch my breath, lose fine motor control, and start feeling faint. Drenching myself in water - the colder the better - every 20 minutes or so is the only way I’ve found to be productive above 100F. I feel like 100F is actively trying to kill me.

  0F is where it starts getting difficult for me to stay warm without an additional heat source.

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  • overcast5348@lemmy.world ⁨1⁩ ⁨week⁩ ago

    Lmao are you a penguin or something? Please tell me that you’re exaggerating to make a point and aren’t seriously saying that you’re capable of staying warm at -10°C (14°F) “without an additional heat source.”

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    • Rivalarrival@lemmy.today ⁨1⁩ ⁨week⁩ ago

      I mean, I have clothes. Long underwear? Layers? Coats, gloves, hats, scarves?

      They say you can always put on more clothes if you’re cold, but that’s not really true. Insulation adds bulk, and bulk reduces mobility. Around 0F is where I start to have real trouble wearing enough clothing to stay warm while still being able to perform the activity that has me outside in that weather. Somewhere around 0F, clothing doesn’t really cut it, and I need shelter or additional heat.

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      • overcast5348@lemmy.world ⁨1⁩ ⁨week⁩ ago

        That’s a lot of moved goalposts to justify the weird temperature scale logic but okay. Have a good day! :)

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