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!

Surface intersected by line parallel to x-axis

  1. Sep 18, 2013 #1

    Consider ## I=\int_S \vec{v} \cdot d \vec{S}=\int_S \vec{v} \cdot \hat{n} dS##, where S is a surface that is intersected once by an line parallel to the x-axis. Show that [tex] dS=\frac{|\nabla f|}{\partial f/ \partial x}dy \ dx[/tex], and that therefore, [tex]I=\int_S \vec{v} \cdot \frac{\nabla f}{\partial f/ \partial x} dy \ dz[/tex]

    Attempt at a Solution:

    Not really sure where to start...:confused:
  2. jcsd
  3. Sep 19, 2013 #2


    User Avatar
    Science Advisor
    Homework Helper

    hi wifi! :smile:

    what do you think f is? :wink:
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Discussions: Surface intersected by line parallel to x-axis