"Ahh!" July may be hot but another cool hit may be coming with the movie "Ice Age" This is the third in the "Ice Age" animated series.

VOA: special.2009.06.12

I want to cool a gas with a Joule-Thomson experiment, what temperature do I have to be at?

给气体降温时,需要到达什么温度？

麻省理工公开课 - 热力学与动力学课程节选