1.

When small droplets floating in atmosphere merge into each other in clouds, they become heavy and cannot float in air and fall down as rain drops. In this process of formation of bigger drops if 'n' small drops each of radius 'r', surface tension “T” coalesce. ThenIf P is the excess pressure in a smaller drop, the excess pressure in bigger drop is

Answer»

<P>`P`
`N^(1//3) P`
`( P)/( n^(1//3))`
`NP`

ANSWER :C


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