If a number of little droplets of water each of radius r, coalesce to form a single drop of
Channel: Doubtnut
Date: 2020-08-30

If a number of little droplets of water each of radius r, coalesce to form a single drop of radius R, show that the rise in temperature will be given by  `Delta0=(3sigma)/(J)((1)/(r)-(1)/(R))  Where `sigma` is the surface tension of water and J is the mechanical equivalent of heat.