In reply to David Jonsson's message of Wed, 9 Apr 2008 08:47:15 +0200: Hi, [snip] >> >Magnetic pressure is a well known concept. >> >http://en.wikipedia.org/wiki/Magnetic_pressure >> > >> >It struck me then that other concepts must be applicable to magnetism too >> >like temperature. >> >> Temperature is really a measure of the average kinetic energy of >> particles, so a >> "magnetic temperature" may not have a lot of meaning. >> > >Then magnetic pressure wouldn't either.
Pressure is just energy density. While temperature is also a global variable, computing it wouldn't be so easy. E.g. For a gas one can use p*V/(nR) to get T (for a perfect gas). By analogy, one could substitute magnetic pressure for p, and the volume of the magnet for V, but what does one substitute for "n", the number of mole of magnetic atoms in the magnet? (not to mention what value to use for R). This is why a precise definition of magnetic temperature is needed. >I have defined what I mean with >magnetic temperature. Where? >Pressure and temperature exist whenever energy is >distributed on smaller components. Any energy form where the components are >interacting have pressure and temperature (or at least heat) and maybe >something more. Strike kinetic in your definition and replace it with >interchangeable. By the way the kinetic and magnetic energy of an electron >are indistinguishable. ...so "n" hereabove would be the number of mole of electrons contributing to the magnetic field? Regards, Robin van Spaandonk The shrub is a plant.
