text: what is relationship between water pressure and temp.? any links or books on the subject of temperature on water pressure (in its fluid form) would be greatly appreciated. my 8th grader is doing aproject on this so it would be great if the pages weren't over the top complicated.                  thanx in advance one needs to know both temperature and density to calculate the pressure of water, or the pressure of any other material for that matter. such a relationship is refered to at an "equation of state". that's a good quote to put into google.