Re: Need Help: Fluid Dynamics Question

I read all of these post for entertainment. The answer as David stated was
quite simple... "Air".

But to see how much it was complicated by Ed, was fun. That is why I had to
put my two cents in. :>) Good job David on being helpful, for Ed...

I know you don't want to stop, so what about if it's liqued murcury on the
space station in zero gravity? Hey a first year student may be up there
typing into a newsgroup. Ha Ha.

Just funin. I like to have fun while learning. :>)

some good material for John can be found at ...
http://www.feedforward.com.au

Hope it helps.

"Ed Ruf" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> On Sun, 14 Sep 2003 10:59:42 -0400, in sci.mech.fluids "John Smith"
> <[EMAIL PROTECTED]> wrote:
>
> >Not at tall. You question is pretty good. What if the pressure at one
side
> >is 1 meter below the sea level and the other side is 1 meter above the
sea
> >level?
>
> Again, one meter of what? If you mean in the atmosphere that's one thing,
> if 1 meter below water level another
>
> Assuming this is all open to the atmosphere, then the pressure difference
> is that due to a column of air 2 meters high.  or
> delta_p = rho*g*h = 1.2*9.81*2 = 23.5 Pa.  With assumption that this is
> about sea level, then this is very far from a sonic pressure ratio. And
> David's analysis will hold.