# (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. (c) The volume of a 250 g sealed tin is 400 cubic cm. Find the density of the tin in g cm^-3. S

(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.

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