Question

Calculate the terminal velocity of a rain drop of radius 0.12cm​

Answer 1

Step-by-step explanation:

Given that,

The radius of rain drop, r = 0.12 cm = 0.0012 m

The viscocity of air is,
`\eta=18* 10^(-5)\ poise`

Let the viscous force is,
`F = 0.010173\ N`

The viscous force is given by :

`F=6\pi \eta rv\\\\v=(F)/(6\pi \eta r)`

Put all the values,

`v=(0.010173)/(6\pi 18* 10^(-5)* 0.0012 )\\\\v=2498.58\ m/s`