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Pressure in pipe

  1. Jun 19, 2016 #1
    1. The problem statement, all variables and given/known data
    8WwL9BO.png

    in this question , the Pressure at entrance is not given , how to do this?

    2. Relevant equations


    3. The attempt at a solution
    does the author mean the pressure at entrance = pressure at exit
     
  2. jcsd
  3. Jun 19, 2016 #2

    billy_joule

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    Science Advisor

    You are expected to find it from the depth of the tank.
     
  4. Jun 19, 2016 #3
    i am going to use this equation to solve this question , where z = 10 m what is the pressure at ENTRANCE ? it's not given
    hMiwoG0.png
    p/s : hf = 0
     
  5. Jun 19, 2016 #4

    billy_joule

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    Science Advisor

    It's unclear where the two points on your streamline are.pipe entry and exit? Or free surface and pipe exit?
    If z=0 is along the pipe axis then z=10 is the water surface, and the pressure there is equal to the exit pressure so both can be set to zero.
     
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