1.

A solid sphere has a radius of 2 cm and a mass of 0.05 kg. What is the relative density of the sphere?

Answer»

Radius of the sphere = 2 cm

Volume of the sphere = \(\frac{4}{3}\)πr3\(\frac{4}{3}\,\times\frac{22}{7}\,\times2\,\times2\,\times2\) = 33.52 cm3

Mass of the sphere = 0.05 kg = 50 gm

Density of the sphere = Mass / Volume = 50 / 33.52 = 1.49 gm/cm3

Relative density = Density of the sphere / Density of water = \(\frac{1.49 \,gm/cm^3}{1\,gm/cm^3}\) = 1.49



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