1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

P-Po=density x g x distance?

  1. Nov 13, 2009 #1
    1. The problem statement, all variables and given/known data

    A mountaineer in the Rockies measures the air pressure to be 10% below that at sea level. At what height above sea level does he make the measurement? At this altitude he finds a small mountain lake of fresh water which is 4.3m deep at its deepest point. What is the pressure at the deepest point of the lake

    2. Relevant equations

    P-Po=density x g x distance?

    3. The attempt at a solution
  2. jcsd
  3. Nov 13, 2009 #2


    User Avatar
    Homework Helper

    Re: Pressure

    Pressure at sea level = pressure due to 76 cm of mercury column.
    10% less of this pressure is 68.4 cm of mercury column.
    So the pressure at the mountain is ρ*g*h'. ρ is the density of the mercury.
  4. Nov 16, 2009 #3
    Re: Pressure

    For the 2nd part P = D*G*H. density of water = 1000kg/m^3. After you get the pressure you simply add the atmospheric pressure. P = Pg + Pa. Make sure your units are correct, throws me off a lot.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: P-Po=density x g x distance?
  1. F(x), G(x) Etc (Replies: 13)

  2. Distance from x to y (Replies: 1)