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(A) When two small bubbles of radii $r_1$ and $r_2$ coalesce to form a single larger bubble of radius $R$,the total surface area of the system decreas

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(A) When two small bubbles of radii $r_1$ and $r_2$ coalesce to form a single larger bubble of radius $R$,the total surface area of the system decreases.Since surface energy $U = T 	imes A$ (where $T$ is surface tension and $A$ is surface area),a decrease in total surface area results in a decrease in the total surface energy of the system.According to the law of conservation of energy,this decrease in surface energy is released into the surroundings,typically in the form of heat or kinetic energy.Therefore,energy is released during the process.

When two small bubbles join to form a bigger one,energy is

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