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Conservation of Fluid Mass

  1. Jan 30, 2014 #1
    1. The problem statement, all variables and given/known data

    Air is blown through a circular and horizontal Venturi tube, as shown in the figure below. The diameters of the narrow and wider sections of the tube are given, and the height h of the mercury column is measured to be 1.00 mm. What are the air speeds in the wider and the narrower sections of the tube? The density of mercury is 13,600 kg/m3. (Assume the density of air is 1.29 kg/m3.)


    2. Relevant equations
    P + 1/2pv^2 + pgh = constant

    A1v1 = A2v2

    3. The attempt at a solution

    A1= pi*2.25e-4
    A2= pi*2.5e-5
    Last edited: Jan 30, 2014
  2. jcsd
  3. Jan 30, 2014 #2


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    Staff Emeritus
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    What's the matter? Is your calculator broken? At least calculate the areas of the entrance and the exit of the venturi.
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