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

  1. Nov 30, 2012 #1

    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


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    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


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    You need one more equation, based on the fact that mass flow within all parts of the venturi tube is constant.
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