Two soap bubble coalesce. It is noticed that, whilst joined together, – McqOptions

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1.	Two soap bubble coalesce. It is noticed that, whilst joined together, the radii of the two bubbles are a and b where a > b. Then the radius of curvature of interface between the two bubbles will be
A.	a – b
B.	a + b
C.	ab/(a – b)
D.	ab / (a + b)
Answer» D. ab / (a + b)

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