Question

A sphere with a mass of 12 g has a radius measuring 2 cm. What is its density?

Answer 1

Since,
Mass = 12 g = 12/1000 kg = 0.012 kg
Radius = 2 cm = 2/100 m = 0.02 m

$= > volume \: = \frac{4}{3} \pi \: {r}^{3}$

$= > \frac{4}{3} \times \frac{22}{7} \times 0.02 \times 0.02 \times 0.02$
=> V =0.000033 m^3

Density=Mass/Volume

=> D = 0.012/0.000033 Kg/m^3

=> D = 363.63 Kg/m^3


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