1. Sep 20, 2012 #1

   abstracted6

   

   All problem info, and my work is done in the attached pdf.
   
   Basically, I'm not sure that I have done it correctly.

    

   Attached Files:

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     1.4-1, fluid flow.pdf

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     101

   abstracted6, Sep 20, 2012
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3. Sep 21, 2012 #2

   LawrenceC

   

   What is the formula for the area of a circle in terms of diameter?

    

   LawrenceC, Sep 21, 2012
4. Sep 21, 2012 #3

   abstracted6

   

   Ooops
   
   So the answer is then:
   
   
   F_p = -[itex]\rho[/itex]v_j²[itex]\frac{\pi}{4}[/itex](D₁² - D₂²)

    

   abstracted6, Sep 21, 2012
5. Sep 21, 2012 #4

   LawrenceC

   

   Looks good to me.

    

   LawrenceC, Sep 21, 2012
6. Sep 21, 2012 #5

   rude man

   

   Homework Helper

   Insights Author

   Gold Member

   Comment: interesting problem; case where change in momentum is vΔm instead of the usual mΔv.

    

   rude man, Sep 21, 2012

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