Question

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

Answer 1

Volume of sphere = 4πr³/3
= 4 × 3.14 × (2 cm)³ / 3
= 33.5 cm³

Density = Mass / Volume
= 50 g / 33.5 cm³
= 1.5 g/cm³

Relative denisty = Density of substance / Density of water
= (1.5 g/cm³) / (1 g/cm³)
= 1.5

∴ Relative Density of sphere is 1.5

Answer 2

Answer:

Radius of sphere=2cm =2/100=0.02 m

Volume of the sphere=4/3

.

r³

=4/3× 22/7×0.02×0.02m³=0.000704/21 m³

Mass of sphere=0.05kg.

Relative density of sphere=density ×10³

=0.05/0.000704\21 ×10

=0.05×21/704×10-6×10³

=1.05×10³/704×10-6

=1.05×10³±6/704=1.05×109/704=1.49×106

Relative density of sphere= 1.49×106 kg/m³

HOPE IT HELPS YOU