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SG (Specific Gravity) in Fluid

  1. Apr 27, 2016 #1
    1. The problem statement, all variables and given/known data

    When asked for the bouancy of a hollow cylinder, containing air, submerged in ocean water.
    outer radius R.
    Length of cylinder = L
    The Material of the cylinder is neglected.

    I'm thinking the Bouancy (Force) = ρ ⋅ g ⋅ v
    where v = LπR^2 and therefore F = ρgLπR^2

    But the solutions manual states it is
    F = ρgLπR^2 ⋅ SG, where SG is Specific gravity of ocean water.
    Why do I need the SG part ?
     
  2. jcsd
  3. Apr 27, 2016 #2
    The density of the water affects the buoyancy of the object.
     
  4. Apr 27, 2016 #3

    gneill

    User Avatar

    Staff: Mentor

    Hi CybernetcInside,

    In future, please use the entirely of the formatting template to lay out your questions.

    Did the book define what the variable ##\rho## stands for in its solution? You didn't define it in your work.
     
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