Volume in Spherical Coordinates

  1. Feb 7, 2012 #1
    1. The problem statement, all variables and given/known data

    express a volume element dV= dx*dy*dz in spherical cooridnates.
     
  2. jcsd
  3. Feb 7, 2012 #2

    lanedance

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    have a crack mate! any ideas?
     
  4. Feb 7, 2012 #3
    Is it simply to convert x y and z into corresponding spherical coordinates (ie r cos θ etc)
     
  5. Feb 7, 2012 #4

    HallsofIvy

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    One way to do this is geometric- given specific r, [itex]\theta[/itex], and [itex]\phi[/itex], mark off a small "[itex]\Delta r[/itex]", "[itex]\Delta \theta[/itex]", "[itex]\Delta \phi[/itex]" about the point and caculate its volume.

    Another is analytic- determine dx, dy, and dz in terms of r, [itex]\theta[/itex], [itex]\phi[/itex], [itex]dr[/itex], [itex]d\theta[/itex], and [itex]d\phi[/itex], then multiply- but remember that multiplcation of differentials is anti-commutative: [itex]a(r,\theta, \phi)drd\theta= -a(r, \theta, \phi)d\theta dr[/itex].
     
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