1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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


    User Avatar
    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?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook