Re: .Bernoulli and curve balls.

[palmer@sfu.ca (Leigh Palmer)]

> Leigh
> Whether Bernoulli knew about molecules or not, we do.  Since the pressue
> changes are an observable fact we should be able to understand them in terms
> of molecules.  I still maintain that pressure results from collisions of
> molecules with the pipe for either a liquid or a gas.  How else can you get the
> pressure?  If the fluid is incompressible you can't change the number of
> molecules hitting the pipe so you have to change the speed or angle with
> which they hit the pipe.  How else can you get a pressure change?

Give me a break! What does it matter that we know about molecules? We were
talking about Bernoulli (classical stuff) and the frequency of molecules
bashing the walls has nothing to do with it. Do molecules at the bottom of
the ocean bash against the bottom 500 times as hard as they do at the
surface? Remember, Bernoulli's theorem applies to incompressible fluids.
Molecules have nothing to do with this stuff.

Leigh