Whereas in the American system, the answer to ‘How much energy does it take to boil a room-temperature gallon of water?’ is ‘Go fuck yourself,’ because you can’t directly relate any of those quantities.
I remember my Science teacher explaining how each system was made, he always freaked out about Imperial units, specially if anything or anyone called out the Farenheits!
- 0 Celsius is where pure water frozens, 100ºC where it boils, under 1atm pressure.
- 0 Kelvin is the absolute "cold" in physics.
- While we had all those rational units, Sir Farenheit put a bucket of water to boil somewhere in the woods, while drunk as f***, went to a nearby tree to take a piss and shouted, "Fuck yeah, I'll call it 212ºF!!".
Then he came back to civilization just like Moses and the ten commandments! And for some damn reason everyone decided it was OK to adopt it without questioning anything!
(He usually came with new ideas about how Sir Farenheit might have gotten into it

)
Ahh that guy was crazy, but funny as hell!