Solving a Hydrostatic Problem: Cylinder Height in Water and Oil

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The discussion revolves around calculating the height of a cylinder submerged in oil after floating in water. The cylinder has a radius of 15 cm, a height of 15 cm, and a mass of 7 kg. Participants suggest using Archimedes' principle and the formula for buoyant force, F = D x V x g, to find the solution. The calculated height of the cylinder when submerged in oil is 7.6 cm. The conversation emphasizes understanding the principles of buoyancy and density in solving the problem.
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Homework Statement



A Cylinder got ratio of 15 cm, and h=15. Their mass=7kg. This is floating in water. After we put oil on it (density=725kg/m^3), on the water.
Calculate what's the height of cylinder when its in oil.


Answer=7.6cm


Homework Equations



F=D x V x g

The Attempt at a Solution


I tried everything


Help please...

Sorry for my english.
 
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Hi, welcome to PF.

brykz said:
A Cylinder got ratio of 15 cm,
I think you mean "radius"...

So now that you know the volume and the height, and also the mass, you can calculate the density.

Homework Equations


F=D x V x g

F is the weight of the cylinder. Now it is surrounded by oil, which is exerting a buoyant force on it.

The Attempt at a Solution


I tried everything
Did you try Archimedes' principle? Do that now.
 
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