Recent content by rach27

Sorry, here I was using 'mass' as in a given set of air molecules. I think that cleared it up. Somehow it was strange to me that the density of something that is not a solid would have meaning (being that we could just define an arbitrary boundary of volume of which to calculate the...

So in this case, then, there is attraction between the molecules, and that is why we may speak of masses of air?

Ok, so the other day I was chatting with a friend of mine, and this doubt came up... It is my understanding that hot air rises over cold air in the atmosphere because, being hotter, it is less dense and, hence, lighter. However, if we consider air as an ideal gas, doesn't that mean that the...