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Fluid mechanics question

  1. Nov 1, 2013 #1
    1. The problem statement, all variables and given/known data


    see the pic attached
    2. Relevant equations

    newton's law of viscosity

    3. The attempt at a solution
    okay, i knew that , since the viscosity of the fuid in the second tube is low, it flows easily than the other, but i don't know which exact euation connects visocsity and flow rate. pls help me.
     

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  3. Nov 1, 2013 #2

    Simon Bridge

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  4. Nov 1, 2013 #3
    Use Hagen-Poiseulle equation. The problem doesn't tell you which tube has the larger radius, so try the problem both ways and see which one matches the answer.

    Chet
     
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