Eight equal drops of water are falling through air with a steady speed of 10 cm s -1 . If the drops coalesce, the new velocity is
Text Solution
Verified by ExpertsThe correct answer is:
B
The terminal velocity can be given by
Clearly, 
Let the radius of the small drops be r 1 and the radius of the big drop be r 2 .
So,
Hence, taking the ratio
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