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Homework Help: Formula of diameter

  1. Sep 4, 2014 #1
    1. The problem statement, all variables and given/known data

    My vocabulary is pretty bad in specialized English, so I have to post a picture of problem

    There are three pipes, the cross-section changes and all measures are illustrative, I need to find an easy formula to find the diameter of d3, so I can create formula in Excel and by changing numbers it calculates the answer.


    2. Relevant equations

    Formulas are from topic of momentum and forces,
    Maybe this helps
    δ= M/W ⩽ δ[adm]

    3. The attempt at a solution

    It should become something like ω/M max * some coefficients, but I havent found anything form books.
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution

    Attached Files:

  2. jcsd
  3. Sep 5, 2014 #2


    User Avatar

    Staff: Mentor

    Perhaps if you were to explain in words what this formula is about, someone might recognize what you are trying to do.
  4. Sep 5, 2014 #3
    It means that the max refraction is 2%. The point is to find diameter of the upper pipe. It depends of the two others.
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