Buoyancy of concrete in water

[Ahmed2810]

Hello, I have a question about buoyancy of concrete in water. If a submersible pump station is placed under water, and it has under it a concrete foundation to hold it in equilibrium.
How can someone calculate the minimum weight of the concrete foundation?

The pump station has a diameter: 1.6 meter
density of the water is: 1000 kg/m^3
Density of the concrete is: 2300 kg/m^3
the height of the submersed item is 2 meter under water

How thick must the concrete foundation be to counterbalance the buoyancy forces?
PS: please show me equations, and not just an explanation

[imatfaal]

!

Moderator Note

Moved to Homework help. Even though we are not sure it is homework per se this question should get a better answer here

 

What do you know about buoyancy forces?

 

Remember you do not need to quantify the forces to answer your question - just provide a rough answer to whether it sinks or floats or lies steady in the water.

 

The simple question of whether something sinks,floats, or sits in equilibrium is answered by a simple expression with only two parts.

 

BTW - when dealing with questions like this it is best to be really precise with terminology - weight is not the same as mass, the kilogram is a unit of mass