A viscous force of `1.018 xx 10^(-7)` N acting on a raindrop makes it fall through air with a terminal velocity of 1 `ms^(-1)`. If the viscosity of air is `0.018 xx 10^(-3)` PI, what is the radius of the raindrop?
Hint : Stokes' law

Explanation

To find the radius of the raindrop using the given information and Stokes' law, we can follow these steps:

### Step 1: Write down Stokes' Law
Stokes' law states that the viscous force \( F \) acting on a spherical object moving through a fluid is given by the formula:
\[ F = 6 \pi \eta r V \]
where:
...