Question

A rain drop of radius 0.3 mm has a terminal velocity in air = 1 m/s. The viscosity of air is 8 × 10⁻⁵ poise. The viscous force on it is (a) 45.2 × 10⁻⁴ dyne (b) 101.73×10⁻⁵ dyne (c) 16.95 × 10⁻⁴ dyne (d) 16.95 × 10⁻⁵ dyne

Answer 1

Answer:

The answer is this,

rain drop of radius 0.3 mm has a terminal velocity in air = 1 m/s. The viscosity of air is 8 × 10⁻⁵ poise. The viscous force on it is (a) 45.2 × 10⁻⁴ dyne (b) 101.73×10⁻⁵ dyne (c) 16.95 × 10⁻⁴ dyne (d) 16.95 × 10⁻⁵ dyne