1.An object which has a volume of 0.18 m^3 requires a force of 265 N to keep it immersed in water. If a force of 157 N is required to keep it immersed in another liquid, find the specific gravity of the liquid
2.The velocity of propagation, c of surface waves is assumed to depend on the water depth, y, the water density and the acceleration due to gravity, g. Express these variables as a dimensionless group.