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!

Find the speed of fluid using bernoulli

  1. Mar 25, 2012 #1
    1. The problem statement, all variables and given/known data
    untitled-7.jpg

    Find v


    2. Relevant equations
    Bernoulli


    3. The attempt at a solution
    Here's what I've done

    I took the surface of water as first reference and the right-end of the pipe as second reference, so:

    P1 + 1/2 ρV12 + ρgh1 = P2 + 1/2 ρV22 + ρgh2

    P1 = P2 = Patm and I assumed v1 = 0 and h1 = 0, then the equation became:
    0 = 1/2 ρV2 - ρgh
    v = √(2gh) ---> ta daa, I'm finished with degree of confidence 0.5 % that my answer is correct.

    Do I get it right? Thanks
     
  2. jcsd
  3. Mar 25, 2012 #2
    It is 100% correct.

    However to build up your confidence lets just clear up how we got here.

    After applying the equations, we realised two things.Pressure at surface and Pressure at exit are same as they are open to atmosphere.

    Then we made velocity zero.
    That was using equation of continuity as surface area of water is much greater than that of pipe.
     
  4. Mar 25, 2012 #3
    Ah I get it. Thanks for the help :smile:
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Find the speed of fluid using bernoulli
Loading...