Question:
tion 10: One thousand small water droplets of equal size combine to form a big drop. The ratio of the final surface energy to the initial surface energy is (Surface tension of water = 70 dyne
Answer:
When 1000 identical drops are combined,the radius of big drop formed will be-
R = n1/3 (r)
R= 10(r)
Here n is the number of small drops and r is radius of a small drop.
So, Energy of the big drop / Energy of small drops.
= 4π(10.r)2 /1000(4π.r2)
=100(r)2 /1000 (r)2
= 1/10
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