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Homework Help: Calculation Flux integral

  1. Nov 28, 2011 #1
    QUESTION: Compute the flux of the vector field, F , through the surface, S.

    F = xi+yj+zk

    S is the part of the surface z = x^2 + y^2 above the disc x^2 + y^2 ≤ 4 , oriented downward.

    I am just wondering why the integrand is from o to 4 while the radius is only 2.

  2. jcsd
  3. Nov 29, 2011 #2


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    Science Advisor

    It isn't. That's incorrect. It should be 2.
  4. Nov 29, 2011 #3
    My solution guide says otherwise, along with my online homework
  5. Nov 29, 2011 #4
    I just emailed my teacher and he said there was an error in the online homework. The correct answer is indeed used with radius 2. Sorry about that.
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