Find the terminal velocity of a rain drop of radius 0.01 mm. The coefficient of viscosity of air is `1.8xx10^-5 N-sm^-2` and its density is `1.2kgm^-3`.Density of water `=1000kgm^-3`. ` Take g=10ms^-2`

Explanation

To find the terminal velocity of a raindrop with a radius of 0.01 mm, we can use the formula derived from balancing the forces acting on the drop when it reaches terminal velocity. The forces involved are the weight of the drop and the viscous drag force due to air.

### Step-by-step Solution:

1. **Convert the radius to meters**:
\[ r = 0.01 \, \text{mm} = 0.01 \times 10^{-3} \, \text{m} = 1 \times 10^{-5} \, \text{m} \]
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