While I'm not proud of this coming sentence, in physics a lot of different things turn out to be roughly the same thing. For example, the flow of electricity is very much like the flow of water, and so voltage closely corresponds to pressure, current closely corresponds to flow rate.
It occurs to me that there seems to be such a similarity between temperature and pressure. Both naturally equalize in an open system. Both fight harder and harder the more extreme the gradients, the temperature manifestation of which is Newton's Law of Cooling, and the pressure manifestation of which is the explosion that results when you puncture a propane can, as opposed to the much smaller explosion resulting from puncturing a whipped cream canister. Moreover, the two are even caused by the same set of factors, which is why we have laws relating the two. But are they duals of each other? Is there a Newton's Law of Depressurization, and so on?