Estimate the speed of vertically falling raindrops from the following data. Radius of the drops 0.02 cm, viscosity of air = 1.8 × 10- 4 poise, g = 9.9 × 10 m s -2 and density of water = 1000 kg m -3 .

Estimate the speed of vertically falling raindrops from the following data. Radius of the drops 0.02 cm, viscosity of air = 1.8 × 10-⁴ poise, g = 9.9 × 10 m s^-2 and density of water = 1000 kg m^-3.

5 m s^-1

Given, radius of drops,

Viscosity,

Density of water,

Here, the viscous force is balanced by the weight.

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