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I was just wondering, if you say "The temperature today was twice as hot as it was yesterday", in which units are people usually referring?

Degrees Celsius doesn't make any sense, since it is perfectly possible for something to be twice as hot or cold as 0C... For the same reason I don't think degrees Fahrenheit make any sense...

So that leaves Kelvin I suppose? Twice as cold as 0 K would still mean 0 K since you can't go any lower, right?

So if today the temperature is 20 degrees C (roughly 293 K) and tomorrow it's twice as hot, would that mean it would be 293 * 2 = 586 K = 313 degrees C...? This doesn't really make sense to me either.

I suppose it's all about how humans physically interpret temperature? If we sense something to be twice as hot that doesn't mean the temperature is twice as hot in any scale we use, right?

So yeah, I was just wondering, is there any 'convention' for this, or does nobody care what twice as hot means? :tongue:

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# Twice as hot / cold ?

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