I was watching a SciFi tv show where large objects had an outer speed limit of 18000 kph and that got me wondering what things in everyday life are faster than even 500 kph.
I know bullets can be fast, but they are not exactly everyday life (at least in my life).
I included mass for obvious relativistic reasons.
This is my high school chemistry talking here, but don’t expanding gasses heat up? Ideal gas law and everything? Is there something weird happening like the CO2 instantaneously pressurizing or something right before expanding?
It’s the other way around, expanding gasses cool down and compression heats them up.
I remember there being something misleading about the “temperature” in pV=nRT, but yeah, I think I was getting confused because I was thinking about it purely formulaicly.
But if the pressure drops and the volume of the gas increases, in order for it to cool, that would mean the drop in pressure is much less significant than the rise in volume?
But yeah, I should’ve remembered that expanding gasses cool, because I know how aerosol cans work. It’s time to touch up on this stuff lol.
I had a similar conversation with my wife a few weeks ago. We were watching the hydraulic press channel, where they were compressing water to very high pressures. When the water inevitably squirted out of the chamber, it turned to steam. My wife said yeah that makes sense, applying that much energy to compress the water would increase its temperature, so it wants to expand to become steam. Then I thought about it a while, and said wait, according to first principles of thermodynamics, shouldn’t compressing water lower it’s temperature?! The turns out the real world is correct, I was wrong.