The surface area of liquid increases, when the sprayed in small droplets. Work has to be done against the cohesive force to increase the surface area. This work is done at the cost of internal energy and hence the temperature of drop falls.
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It is possible to produce a fairly vertical film of soap solution but not of pure water. Explain.
How does the surface tension of water change with impurities?
Given, n identical drops (each of radius r) of liquid of surface tension T and density ρ coalesce to form single drop. The energy released in the processes is converted into heat. Find the increase in the temperature of drop.
n identical drops (each of radius r) of liquid of surface tension T and density ρ coalesce to form single drop. The energy released in the process is converted into kinetic energy. Find the speed of drop.
