1. Not finding help here? Sign up for a free 30min 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!

Pressure in a closed system using an inclined manometer

  1. Apr 12, 2013 #1
    1. The problem statement, all variables and given/known data
    In the figure attached the pressure at A and B are the same 100 kPa. If water is introduced at A to increase p_A to 130 kPa find the new positions of the mercury menisci. The connecting tube has a diameter of 10 mm. Assume no change in Liquid density.


    2. Relevant equations

    P A - P B = ρmerc g (Δ L) sin σ



    3. The attempt at a solution

    30 000 = (13600)(9.81) (Δ L) (0.26)
    ΔL = 0.868
    h = 0.225 m

    Intuitively this answer should be wrong because if there is an increase in pressure at A it should transfer through out the system to create an equilibrium. There would be no change in the mercury menisci if the air did not compress.

    I think I need to work out a change in air density to get the correct answer. I am also not sure why they mentioned the diameter of the connecting tube.

    Would you mind helping me get on the correct track.

    Thank you
     

    Attached Files:

  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?



Similar Discussions: Pressure in a closed system using an inclined manometer
  1. Manometer Problem (Replies: 0)

Loading...