rvanspaa
Sat, 28 Jun 2008 18:23:47 -0700
In reply to David Jonsson's message of Sun, 29 Jun 2008 02:00:17 +0200: Hi David, [snip] >Please check >http://djk.se/physics/ [snip] >Degrees of freedom is 5 so the relation between kinetic energy and heat is >Eheat=k BT=5 m<v >2 >2 >The rotational energy of an air molecule is for one degree of freedom is one >fifth of the above If there are 3 degrees of translation, then there should also be 3 degrees of rotation, except that 1 of these is about the molecular axis, which leaves only 2. Thus, 5 altogether so far. There is also 1 degree of vibrational freedom (along the molecular axis), hence 6 in all IMO. Of these, 2 are rotational, hence 1/3 of the total. This isn't my strong suit, so anyone feel free to correct. Regards, Robin van Spaandonk The shrub is a plant.