Why do a number of droplets coalesce to form a bigger drop?
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A large number of droplets, each of radius a, coalesce to form a bigger drop of radius b. Assume that the energy released in the process is converted into the kinetic energy of the drop. The velocity of the drop is σ= surface tension, ρ= density)
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Two individual liquid drops have a greater surface area than that of a single drop formed after their coalescence. ... Since final energy(after coalescence) is less than the initial energy, energy must be released in the process. Therefore, coalescence of drops releases energy and splitting up a drop requires energy.
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