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Convert linear density to area and volumetric density?

  1. Nov 16, 2006 #1
    if I am given a area density of 10^-4, I can get linear and volumetric density from that right? I just cant seem to figure it out.
     
  2. jcsd
  3. Nov 16, 2006 #2

    OlderDan

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    Only if you know the shape of an object you are working on.
     
  4. Nov 16, 2006 #3
    It is a square (not a cube, a flat square surface)
     
  5. Nov 16, 2006 #4

    OlderDan

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    Then the total mass of the object is

    M = σA

    The volume density is

    ρ = M/V = σA/V = σA/(AT) = σ/T

    where T is the thickness of the plate.

    If you want the linear density, it is only constant in a direction parallel to one side of the plate. See if you can do that one.
     
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