Ronald Raygun wrote:
Doctor Drivel wrote:

"Ronald Raygun" wrote in message
...

So if defies gravity.
Something doesn't defy gravity just by going up.
A helium filled balloon goes up because gravity is pulling on the
air around and above it more strongly than on the balloon itself.
The balloon defies gravity. It goes up against the pull of gravity.

Drivel!

Take a playground see-saw. Small child on one end. Along comes big
child, sits on other end. Big child's end goes down, small child's
end goes up.

Would you say the small child is defying gravity? No, of course
you wouldn't. The fact is that gravity is *making* the small
child go up as a side effect of pulling the big child down.

It's the same with the balloon. Gravity pulls down on the heavier
air around it, into the space underneath, and this is what forces
the balloon up.

Without gravity the balloon would not go up.

I never like getting involved in these 'does the mortar hold the bricks
together, or keep them apart' arguments..

;-)