--air density thermo-dynamic principals--

    air, air density, temp...the main factors--
 here goes--

   when air is heated, there are not only more collisions per-second, but momentarily, there are more molecules, in the air being warmed( for a nano-second, before the extra molecule is kicked out, and is radiated away)...meaning, when cold air enters a home being heated, the heat does not merely escape...( this explains a "drafty" home), the process is a convection, of cold air entering, and warm air being radiated away--

     separated  atmosphere's of air/ r-value example--

    a space, like 1 pane of glass( 1 atmosphere), between another pain of glass( atmosphere #2), and a third piece( atmosphere#3), with molecules in between each atmosphere, has a larger, and larger, number of collisions per-second, the closer the atmosphere is, to the air of the heated room(4th "atmosphere"), that is colliding at the fastest rate--


thermal halos--

   there is an "air-cushion", or ("thermal halo"), around all things, that is a "thermal grey-area", between the two temps...this is how one outer atmosphere, transfers( sinks), cold air( with a slower molecular harmonic), into the room, through each atmosphere of the windows in a home, exchanging colder molecules, for hotter ones( with a higher molecular harmonic), per pain of glass( atmosphere), radiating the heat molecules away( to the outside air, one atmosphere at a time)--

  --see post for "r-value per atmosphere calc"--


the point--

   a room looses heat, due to "molecular joiners" crashing the party( cooler molecules, with a slower molecular harmonic), all things move from areas of greater concentration, to a lesser, until equalized--

summary--

    and so, a molecule that is cooler( with a slower "molecular harmonic"), breaks out of the atmosphere with slower motion( and less collisions), entering the frey, of the "thermal halo" in the next atmosphere's hotter air, with more rapid collisions, thus kicking a super-hot( higher molecular harmonic), molecule, out of the jumble, like a marble being knocked out of the chalk circle, in a child's game of marbles--

    this hot molecule then radiates away from the hot molecular jumble, into the cold( slower moving air), the process is a convection, and the more air( atmosphere's), and "thermal halo's", of the glass( or barriers), between the coolest atmosphere( outside, in the case of winter, and your home), and the small barrier separating them( a window, coat, ect...), the slower the transfer, of cold air becoming hot...sinking the heat away--

    the heat radiates away...yes, but only because a cooler molecule has joined a jumble of molecules colliding at a faster rate( higher "molecular harmonic"), and one of the hot molecules, with the higher "molecular harmonic", has been kicked away( in an exchange), one cooler molecule, for one that is hotter...thus "radiating heat"--

--see "molecular harmonics" post, for more detail--

   i suggest then, that cold air, has the same number of molecules, not less( moving in a given space), than warm air does, and that the two merely have a different number of collisions per-second( "harmonics")...and that when one molecule joins the jumble( a cooler molecule), of the next atmosphere, one must be kicked away( the hotter of the two, with a higher "molecular harmonic")--

  
best wishes, john kruschke--


 (cs)