Neglecting the density of air, the terminal velocity obtained by a raindrop of radius `0.3 mm` falling through the air of viscosity `1.8 xx10^(-5) N//m^(2)` will be

Options

A. `10.9(m)/(s)`
B. `8.3(m)/(s)`
C. `9.2(m)/(s)`
D. `7.6(m)/(s)`

Answer

B

Explanation

`v_(t)=(2r^(2)rhog)/(9eta)`