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!

Bernoulli's principle- fluids ?

  1. Nov 18, 2009 #1
    bernoulli's principle- fluids....?

    1. The problem statement, all variables and given/known data

    http://img30.imageshack.us/img30/4119/45086777.jpg [Broken]

    2. Relevant equations

    P2+1/2pv1^2 = p1+1/2pv2^2
    P+1/2mv^2 + pgy = constant

    3. The attempt at a solution

    2*g*h*A1^2V1^2/ A2^2=V1^2

    and im stuck.... i end up canceling the V1 >:(
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Nov 18, 2009 #2
    Re: bernoulli's principle- fluids....?

    i've tried like 10 different things and i cant get it..
  4. Nov 19, 2009 #3


    User Avatar
    Homework Helper

    Re: bernoulli's principle- fluids....?

    Do you think this equation correct? "P2+1/2pv1^2 = p1+1/2pv2^2"

  5. Nov 19, 2009 #4


    User Avatar
    Science Advisor

    Re: bernoulli's principle- fluids....?

    Write out your full Bernoulli's equation:
    P + \frac{\rho V^2}{2} + \rho g z = c
    The pressure values are both places are ambient so they cancel. You have the change in distance z2 - z1, so the only thing left is to find the velocity. Unfortunately, you don't have this.

    So, it will be useful to write our your velocity term as a function of mass flow and area. You know that mass flow is equal, so you will eventually be left with simply area.
  6. Nov 19, 2009 #5
    Re: bernoulli's principle- fluids....?

    i got it!!
    thanks !!!!!!!! :D
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Bernoulli's principle- fluids ?
  1. Bernoulli's principle (Replies: 3)

  2. Bernoulli Principle (Replies: 1)

  3. Bernoulli Principle (Replies: 1)