A cubical block of wood weighing 200 g has a lead piece fastened underneath. Find the mass of the lead piece which will just allow the block to float in water. Specific gravity of wood is 0.8 and that of lead is 11.3.
A lead block weighs 2,268 g and its volume is 200 cm3, Then the density of lead is
A piece of iron weighs 44.5 gf in the air. If the density of iron is 8.9×103 kg m−3, find the weight of iron piece when immersed in water.