On Thu, 17 Aug 2006 12:43:58 -0400, Keith Williams
wrote:


As to convection, it was always described and seems to be limited to
broad currents, such as hot air rising and cold air sinking, but is
that all that happens? In, say, a room with moderate cooling in the
summer or moderate heating in the winter, while in general the hot air
rises, doesn't the random motion of some of the hot air cause it to go
downward and to mix with the cooler air below it? Is this radiation?

Some by radiation, some by conduction, mostly convection though.

Is it still convection? Or is it diffusion and for reasons of
definition, not one of the other three?

Diffusion normally relates to different gases/liquids. If they're
the same I'm not sure how you track the molecules.

Can't they tie little transmitters to them, like they do with wild
animals?

I guess not.

They'll swap
heat by bumping into each other (conduction).

I guessed radiation and convection and you and most of you said it's
conduction, the only one I iddn't guess. Oh, well.

Thanks to you and everyone (except the trekkies )

I didn't answer right away because I read alt.home.repair and it has
so much traffic, I missed the whole thread for 2 days (until I
remembered to go looking for it.)

--
Keith