• Support PF! Buy your school textbooks, materials and every day products Here!

SG (Specific Gravity) in Fluid

  • #1

Homework Statement


[/B]
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 ?
 

Answers and Replies

  • #2
18
0
The density of the water affects the buoyancy of the object.
 
  • #3
gneill
Mentor
20,792
2,770
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.
 

Related Threads on SG (Specific Gravity) in Fluid

  • Last Post
Replies
8
Views
545
  • Last Post
Replies
1
Views
4K
  • Last Post
Replies
4
Views
1K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
1
Views
527
  • Last Post
Replies
1
Views
9K
  • Last Post
Replies
0
Views
2K
  • Last Post
Replies
11
Views
1K
Replies
4
Views
601
  • Last Post
Replies
2
Views
614
Top