Question
Question: Find the surface energy of water kept in a cylindrical vessel of radius 6 cm. Surface tension of H<s...
Find the surface energy of water kept in a cylindrical vessel of radius 6 cm. Surface tension of H2O = 75 × 10-3 Nm-1.
A
(a) 17 × 10-4J
A
(b) 8.5 × 10-4 J
A
(c) 4.2 × 10-4 J
A
(d) 8.5 × 10-2 ergs.
Explanation
Solution
(b)
πr2(T) = 22/7 × 62 × 75 × 10-3 × 10-4 = 8.5 × 10-4 J.