# SG (Specific Gravity) in Fluid

## Homework Statement

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When asked for the bouancy of a hollow cylinder, containing air, submerged in ocean water.
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 ?

## Answers and Replies

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The density of the water affects the buoyancy of the object.

gneill
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.