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Homework Help: Density problem

  1. Feb 24, 2013 #1
    How many grams of copper are required to make a hollow spherical shell having an inner radius of 5.70 cm and an outer radius of 5.75 cm? The density of copper is 8.92 g/cm^3.

    Ok, so, how do I find the height? Or solve the problem without the height?
  2. jcsd
  3. Feb 24, 2013 #2


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    It's a hollow sphere, and you are given the inner and outer radii.

    What height are you talking about?
  4. Feb 24, 2013 #3


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    It's a sphere. It's symmetric. If you are given a radius, that gives you the distance from centre to edge in ANY direction.

    Do you know the equation for the volume of a sphere? (I edited this post)
    Last edited: Feb 24, 2013
  5. Feb 24, 2013 #4
    Oh, my bad xD! When I saw shell, I immediately thought cylinder.
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