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Homework Help: Evaluate the flux of F(x,y,z)=xi + yj + zk

  1. Nov 16, 2008 #1
    1. The problem statement, all variables and given/known data
    Evaluate the flux of F(x,y,z)=xi + yj + zk across the surface q:x^2+y^2+z^2=16, oriented by unit normals.


    2. Relevant equations


    3. The attempt at a solution
     
  2. jcsd
  3. Nov 17, 2008 #2

    HallsofIvy

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    Science Advisor

    Re: Flux

    One: I don't see any attempt at a solution- just integrate!

    Two: Since there are no bounds to the surface it looks to me like the flux will be infinite. Weren't there any boundaries given?

    Three: You have copied the problem incorrectly. "Oriented by unit normals" makes no sense. There are two unit normals at a point of any surface. The orientation is given by choosing one of them. Oriented by which unit normal?
     
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