[TheForge] Re: a lot of unimpressive BS

[Mike Spencer]

> I just have to reply to this. Can't help my self. The hot air
> rises!!! If it don't, the cold air could never get under it.

I dunno as Tom needed to get snippy with you but look:  Stuff only
moves because there's a force on it.  The only force we got here is
gravity and gravity always points down.  So hot air sinks.  Cold air
sinks.  But cold air sinks harder than hot air, exerts a force on nearby
hot air and pushes it out of the way.

Hot air does not rise on its own, accidentally making way for cold air
that rushes in to fill the empty seat.  It just don't 'cause gravity
is what does the pushing and gravity doesn't point up.  Same goes for
helium baloons.

Okay, it's all more complicated than that: eddies, cross drafts, local
temp differences that you don't know are there, downburst cells etc.
But the principle is right.

- Mike

-- 
Michael Spencer                  Nova Scotia, Canada       .~. 
                                                           /V\ 
mspencer@tallships.ca                                     /( )\
http://home.tallships.ca/mspencer/                        ^^-^^

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