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Bernoulli and Continuity Question

  1. Jan 27, 2008 #1
    Bernoulli and Continuity Question!!

    A river (100 m wide) flows through its rectangular channel at a depth of 2.560 m at a velocity of 2.050 m/s. What is the velocity of the discharge if the channel is narrowed to 90 m?

    Continuity equation: Q1 = 100m x 2.560 m x 2.050 m/s
    Q2 = 90 m x H2 x V2

    Bernoulli equation: V^2/2g + P/pg + z = constant

    I can't seem to set up the equations properly in order to find intercept. I'm sure that P1 (ie. pressure1) is zero, but P2 isn't. I actually tried solving the question with P2=0 but it's wrong.

    A little help?
     
  2. jcsd
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