Question
Several spherical drops of a liquid of radius r coalesce to form a single drop of radius R. If T is surface tension and V is volume under consideration, then the release of energy is
Options :
3VT(1/r + 1/R)
3VT(1/r - 1/R)
VT(1/r - 1/R)
VT(1/r² + 1/R²)
Answer :
3VT(1/r - 1/R)
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