# Pressure at the Bottom

Am i wrong in assuming that volume is of cylinder?

Doc Al
Mentor
P(below)= P(above)+density*gh

P(above) would that be considered atmospheric pressure?
That's what I would assume.

LowlyPion
Homework Helper
Sorry I confused things earlier by dropping the atmospheric pressure. It is needed here for a static liquid.

How would I calculate that? Force=Pressure/Area

Sorry I confused things earlier by dropping the atmospheric pressure. It is needed here for a static liquid.

No worries, you have helpped me a lot! I apperiate it.

Doc Al
Mentor
How would I calculate that? Force=Pressure/Area
Calculate what? You are given Pb and you know Pa.

how do i know Pa already?<<<<<<This would solve all my problems?

Doc Al
Mentor
how do i know Pa already?<<<<<<This would solve all my problems?
See post #27. That's what we've been talking about.

I understand the equation, but i don't know how to come up with a number for Pa, to plug into the equation.

Doc Al
Mentor
I understand the equation, but i don't know how to come up with a number for Pa, to plug into the equation.
Hint: What's atmospheric pressure in units of atm? :tongue:

(You can also express atmospheric pressure in standard units.)

1 atm= 101300 Pa....thats it?

Doc Al
Mentor
1 atm= 101300 Pa....thats it?
Sure. Note that the pressure at the bottom is given in units of atm.