Year: 2014
Topic: Thermal properties of matter
Time :
1. A certain number of spherical drops of a liquid of radius \(r\) coalesce to form a single drop of radius \(R\) and volume \(V\) If \(T\) is the surface tension of the liquid, then
(1). energy = \(4V T \left(\frac{1}{r} - \frac{1}{R}\right)\) is released
(2). energy = \(3V T \left(\frac{1}{r} + \frac{1}{R}\right)\) is absorbed
(3). energy = \(3V T \left(\frac{1}{r} - \frac{1}{R}\right)\) is released
(4). energy is neither released nor absorbed