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Homework Help: Help help help

  1. Aug 27, 2009 #1
    Help help help!!!

    eq#1) -1/r(d/dr)(r*tao)=0
    eq#2)tao=m(-dv/dr)^n (n is a parameter)

    for v=0 at r=R and v=V and r=kR (k and V are parameters)

    I cannot figure this out for the life of me!
  2. jcsd
  3. Aug 29, 2009 #2
    Re: Help help help!!!

    Hello juice34,

    It does not seem that difficult. I assume that the independent variable is r and that the dependent one is v. The first step is to substitute the second equation into the first one and leaving out the part which is divided away with regards to the zero on the right hand side. This gives:

    << complete solution deleted by Mentors >>

    Check this calculation again step by step to make sure I did not make a mistake.

    Last edited by a moderator: Aug 31, 2009
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