(a) Define relative density. Give its mathematical farm.

(b) The mass of an iron cube having an edge length 1.5 cm is 50 g. Find its density.

© The volume of a 250 g sealed tin is 400 cubic cm. Find the density of the tin in g cm^-3.State if the object would sink or float in water.

(a) Relative density of a substance is the ratio of its density to that of water.

Mathematically, we have

Relative density = density of substance / density of water

(b) Volume of iron cube = length x length x length

= 1.5 x 1.5 x 1.5

= 3.375 cm^3

Density = 50 /3.375

= 14.82 g cm^-3

This is greater than the density of water (1 g cm^-3), thus the object would sink.