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What is the relation between a shell and a solid sphere?

  1. Jul 11, 2011 #1
    1. The problem statement, all variables and given/known data


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    2. Relevant equations



    3. The attempt at a solution

    What is the relation between a shell and a solid sphere?
    Can you give me some hints?
     

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  2. jcsd
  3. Jul 11, 2011 #2
    Re: Gravitation

    A solid sphere can be thought of as composed of an arbitrarily large number of smaller shells...
    How could you 'add up' the effects of many smaller shells, to construct a sphere?
     
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