i have a physics problem about buoyancy and could really use some help! a cubical block of wood 10cm on a side, floats at the interface between oil and water with the lower surface 2cm below the interface. the density of oil is 0.6 g/cm^3 and the density of water is 1.00g/cm^3. what is the mass of the block? it also has a picture that shows that the container is filled with 10cm of oil on top of 10 cm of water. force=(density)(volume)(gravity) i have no idea where to even begin!