Comment on Half as Hot
bdonvr@thelemmy.club 4 weeks agoLet’s say the summer average is 30⁰C or 303.15 Kelvin
The absolute coldest possible temperature is -273.15⁰C, or 0K.
Halfway between absolute zero and 30⁰C/303.15K is somewhere around -121⁰C/152K
So if it were half as hot in the summer, it would be colder than ever recorded on earth.
frezik@midwest.social 4 weeks ago
In short, you don’t want to use a temperature scale with an arbitrary starting point for doing calculations like this. The freezing point of water is no more or less arbitrary than the freezing point of oxygen or sodium or anything else. It’s just one that’s somewhat useful for everyday use. When handling calculations for multiplying temperature, you want an absolute scale like Kelvin.
Or Rankine if you’re that kind of pervert.
GrammarPolice@lemmy.world 4 weeks ago
What makes Kelvin absolute, and why is Celsius “wobbly”?
I failed physics in high school
Bumblefumble@lemm.ee 4 weeks ago
0 K is like when there is 0 heat basically, while celsius isn’t. Imagine a unit for distance called “good” where 0 goobs is 100 m and 1 goob is 115 m. In that case the goob unit would behave differently than a meter when you multiply and divide because 0 of the units don’t actually correspond to “nothing” in a physical sense. That’s exactly how the Celsius scale is, with zero being placed somewhere arbitrarily, not at a physical zero.
lightsblinken@lemmy.world 4 weeks ago
i feel like i need more goob in my life. do you sell rulers?
yetiftw@lemmy.world 4 weeks ago
absolute scales are still arbitrary. you would probably want to use a scale that measures “perceived heat” which is different than average kinetic energy
KairuByte@lemmy.dbzer0.com 4 weeks ago
Kelvin is just our word for it, but that is the point of “no heat”. It isn’t arbitrary, there is no “negative kelvin” just like you cannot make something colder than absolute zero.
So if you take the difference between “coldest possible temp” and “average summer temp”, then slice it in half, you’re getting temperatures that would kill most life on earth.
frezik@midwest.social 4 weeks ago
Just to nitpick, there are negative kelvins. I don’t really understand it, myself, but I know it exists due to the specifics of how temperature is defined. Negative kelvins are actually extremely hot.
yetiftw@lemmy.world 4 weeks ago
just because it has a reason doesn’t make it not arbitrary. you can ultimately come up with a reason for all arbitrary decisions