Question

Two small drops of mercury each of radius R coalesce to form a single large drop. The ratio of total surface energy before and after the change is:

(1) 2^1/3 : 1

(2) 1 : 2^1/3

(3) 2 : 1

(4) 1 : 2

Answer 1

Correct option is (1) 2^1/3 : 1