Yeah but C makes more sense. 0-10 is cold but not freezing, 10-20 is cool, 20-30 is warm, 30-40 is hot, 40+ is “you’re gonna die of heat exposure! Get inside, what are you doing?!” increasing in urgency with the number. If it’s in the negatives, it’s the same as the 40+ except “cold exposure”.
It makes more sense in terms of our perception. But from a science perspective Klevin Kelvin makes more sense since you can’t go lower than 0 K and negative temperature doesn’t really make sense, since it’d mean something like negative energy.
Negative absolute temperature is a thing. Lasers exhibit negative temperatures when active, i.e. the lasing medium has a negative temperature expressed in Kelvin. Adding more energy doesn’t increase its entropy, it just turns into more laser light. Any such system with bounded entropy can have a negative thermodynamic temperature.
I wouldn’t say it corresponds between negative and positive. -20 is already a lot more dangerous than 40.
Depends where you live, I guess. I don’t really consider -20 to be dangerous but I live in Canada so I know how to dress for cold weather.
I’ve always thought it’s like: 0- is freezing, 10 is cold, 20 is ok, 30 is hot, 40+ is hell
Also 0 is freezing so it can’t snow unless the temperature is below zero.
