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Q.

A large number of liquid drops each of radius r coalesce to form a single drop of radius R. The energy released in the process is converted into the kinetic energy of the big drop so formed. The speed of the big drop is (given surface tension of liquid is T, density of liquid is ρ)

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a

Tρ1r1R

b

4Tρ1r1R

c

6Tρ1r1R

d

2Tρ1r1R

answer is D.

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Detailed Solution

12mv2=4πR3T1r1R

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