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What's is dv for a finite cylinder?

  1. Sep 19, 2011 #1
    For an infinite cylinder dV=2*pi*r*L*dr
    Would dv=pi*L*r*dr for a finite cylinder?
  2. jcsd
  3. Sep 20, 2011 #2


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    Staff: Mentor

    Explain this in words, to show that you understand it and how it arises.
  4. Sep 20, 2011 #3
    Yes, this definitely still holds;
    I could also refer you here, for the proof:http://en.wikipedia.org/wiki/Cylinder_(geometry)#Volume"
    Beware that an infinite cylinder carries, A volume per unit length, or, L is unknown...
    Both formulae are correct and useable...
    Last edited by a moderator: Apr 26, 2017
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