Work done in splitting a drop of water of 1 mm radius into 106 droplets is (Surface tension of water =72×10-3 J/m2)

(a) 9.58×10-5 J                  (b) 8.95×10-5 J

(c) 5.89×10-5 J                   (d) 5.98×10-5 J

(b) Work done in splitting a water drop of radius R into n drops of equal size

=4πR2T(n1/3-1)

=4π×(10-3)2×72×10-3×(106/3-1)=4π×10-6×72×10-3×99=8.95×10-5 J

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