Question

Two fog droplets have radii ratio of 2:3 their terminal velocities are in the ratio of??

Answer 1

Given :

Ratio of radii of fog droplets = 2:3

To Find :

The ration of terminal velocities of the fog droplets

Solution :

• Terminal velocity of a droplet is directly propotional to the square of the radius of the droplet

        $v\propto r^{2}$

• From the relation above we can write

        $\frac{v_{1} }{v_{2}} \ = (\frac{r_{1} }{r_{2} })^{2}$

• By substituting the values in the above equation

        $\frac{v_{1} }{v_{2}} \ = (\frac{2}{3})^{2}$

        $\frac{v_{1} }{v_{2}} \ = \frac{4}{9}$

The ratio of terminal velocities of fog droplets is 4:9

Answer 2

Answer:

4:3

Explanation:

This is the right answer