Ten drops of a liquid of density 
and each of radius r are falling through air with a constant velocity 
. When the 8 drops out of 10 drops coalesce to from a single drop, the terminal velocity of the new drop will be
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Eight drops coalesce to form one drop of radius R.
Volume of Big drop 
…(i)
Volume of each smaller drop 
…(ii)
from equation (i) & (ii) we get
Terminal speed v is related to radius r as,
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