NEET Physics Mechanical Properties of Fluids Questions Solved

A drop of mercury of radius 2 mm is split into 8 identical droplets. Find the increase in surface energy. (Surface tension of mercury is 0.465 J/m2
(a)23.4 μJ                              (b) 18.5 μJ
(c) 26.8 μJ                              (d) 16.8 μJ

(a) Increase in surface energy or work done in splitting a big drop 4πR2T(n1/3-1)

W=4π×(2×10-3)2×0.465(81/3-1)=23.4 μJ

Difficulty Level:

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