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.
phobiac@lemmy.world 1 month 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.
Swedneck@discuss.tchncs.de 1 month 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?
phobiac@lemmy.world 1 month 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.
Rivalarrival@lemmy.today 1 month 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.
psud@aussie.zone 1 month ago
At what molar concentration? Was it just as much NH4Cl as he could dissolve at ambient temperature and pressure?
phobiac@lemmy.world 1 month ago
As I understand it, yes it was a saturated solution.