Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Bernoulli's Principle with a Venturi Tube, find flow rate

  1. Nov 30, 2012 #1
    1zlxbi0.png

    So that's the question and I'm stuck on Part b. I don't even know how to approach it. I know A1= 3A2 but I don't know A1 and I need V2 and I don't know V1 or A2. I'm just confused as to how to do this. Please help!
     
  2. jcsd
  3. Nov 30, 2012 #2

    haruspex

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Are you aware of Bernoulli's equation? You mention Bernoulli in the title but don't quote the equation.
     
  4. Nov 30, 2012 #3
    I understand the equation ρgy1+ (1/2)v1^2 + P1 =ρgy2+ (1/2)v2^2 + P2 but I do not understand how to apply it to this
     
  5. Nov 30, 2012 #4

    rcgldr

    User Avatar
    Homework Helper

    You need one more equation, based on the fact that mass flow within all parts of the venturi tube is constant.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook