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Pipe flow question?

  1. Mar 17, 2013 #1
    1. The problem statement, all variables and given/known data
    BlX3nDy.png

    This is in the pipe flow section and the solution treats this question like a pipe. Here is the solution:
    8cDxBGX.png

    As you can see I circled the pipe flow equations in red. If this is the case shouldn't there be frictional head loss, hf, caused by the walls of the tank? I don't understand there solution.
     
  2. jcsd
  3. Mar 18, 2013 #2

    SteamKing

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    The velocity of the fluid caused by the decrease in depth as the reservoir empties is so small that any frictional head loss can be neglected.
     
  4. Mar 18, 2013 #3
    How is the question even a pipe though :O
     
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