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Double Integral Surface Area of Spherical Ball

  1. Nov 13, 2013 #1
    1. The problem statement, all variables and given/known data

    Double Integral Surface Area of Spherical Ball radius

    2. Relevant equations

    ##\int_S d\vec{S} = 4*\pi*a^2##

    3. The attempt at a solution

    ##\int\int_0^a f(r,?) dr d? = 4*\pi*a^2##
     
    Last edited: Nov 13, 2013
  2. jcsd
  3. Nov 13, 2013 #2

    LCKurtz

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    What is the dS element in spherical coordinates?
     
  4. Nov 13, 2013 #3
    ##dS = r^2*sin\phi*d\theta*d\phi##

    I can take it from here!
     
  5. Nov 13, 2013 #4

    LCKurtz

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    Good. Remember the only two variables are ##\theta## and ##\phi##. The radius is constant.
     
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