Question

Buoyancy? Do 1 kg of iron and 1 kg of wood sink alike?

Answer 1

Buoyancy is based of of density, which is \[\frac{ Mass }{ Volume }\]Since the volumes are probably not constant, will their density and therefore buoyancy be the same?

Answer 2

but what if their volume is the same?

Answer 3

to sink in a fluid, the object needs to be more dense than that fluid. compare the densities of wood and iron with that of water or whatever the fluid is.

Answer 4

but be careful, ships can be made of iron. and they float(!!)

because the density of the body (boat, not the iron) is less than the density of water.