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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A bubble having surface tension T and radius R is formed on a ring of radius b(b<<R). Air is blown inside the tube with velocity v as shown. The air molecule collides perpendicularly with the wall of the bubble and stops. Calculate the radius at which the bubble separates from the ring.

A bubble having surface tension T and radius R is formed on a ring of radius b(b<<R). Air is blown inside the tube with velocity v as shown. The air molecule collides perpendicularly with the wall of the bubble and stops. Calculate the radius at which the bubble separates from the ring.

each of radius 2 mm fall through aiir at a terminal velocity of 8 cm/s. If they coalesce to form a single drop n drops of water then the terminal velocity of the combined drop is 32 cm/s. Find n.