If a number of little droplets of water, each of radius `r`, coalesce to form a single drop of
Channel: Doubtnut
Date: 2020-07-26

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 `(3T)/J(1/r-1/R)` where `T` is the surface tension of water and `J` is the mechanical equivalent of heat.