1. Not finding help here? Sign up for a free 30min 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!

Flux problem

  1. May 2, 2008 #1
    1. The problem statement, all variables and given/known data

    The following vector field is given: F = < x + y^3, y, z - y^3 >

    Let T be the solid given in cylinder coordinates by: r [0,1], tetha [0, pi], z [0, 2]

    Find the flux out of the curved part of the surface of T.

    2. The attempt at a solution

    The normal vector n is < x, y, 0 >

    F*n is therefore 1 + xy^3

    Then I need dS = sqrt(1 + zx2 + zy2) dx dy. Is this simply 1 dx dy?
  2. jcsd
  3. May 2, 2008 #2


    User Avatar
    Science Advisor
    Homework Helper

    But x and y aren't the variables you are going to integrate over, are they? Don't you want to integrate over theta and z? (You are sort of right, in the sense that dS is independent of the integration variables, if you choose them correctly).
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Flux problem
  1. Flux problem (Replies: 1)

  2. Flux problem (Replies: 3)

  3. Flux Problem (Replies: 5)