A partially filled bucket of water sits on a scale and its weight is 4.8 N. A piece of metal is suspended from a thread and completely immersed in the bucket (but does not touch the bottom). The scale now reads 7.8 N. Find the volume of the metal.

Answer 1

The added weight represents the water displaced to provide (7.8-4.8)N bouyancy.

Volume=masswater/densitywater
= 3kg/9.8kg/m^3 / 1E3kg/m^3
= 3/(9.8*1E3) m^3
or 3/9.8 liters