A large number of liquid drops each of radius ' a ' are merged to form a single spherical drop of radius ' b '. The energy released in the process is converted into kinetic energy of the big drop formed. The speed of the big drop is [ 
density of liquid, 
surface tension of liquid]
Text Solution
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Volume of small drop of radius a 
Suppose there are n small drops. These small drops merge to form a bigger drop of radius b. Its volume
So, 
Decrease in surface area of drop
[Using eqn. (i)]
Energy released in process 
Kinetic energy of big drop
[ 
surface tension of liquid]
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