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If two soap bubbles of different radii are connected by a tube. (a) air flows from the smaller bubble to the bigger. (b) air flows from bigger bubble to the smaller bubble till the sizes are interchanged (c) air flows from the bigger bubble to the smaller bubble till the sizes become equal (d) there is no flow of air.

If two soap bubbles of different radii are connected by  a tube.
(a) air flows from the smaller bubble to the bigger.
 (b) air flows from bigger bubble to the smaller bubble till the sizes are interchanged
(c) air flows from the bigger bubble to the smaller bubble till the sizes become equal
(d) there is no flow of air.

Grade:upto college level

1 Answers

Navjyot Kalra
askIITians Faculty 654 Points
9 years ago
(a). Let pressure outside be P0
∴ p1 (in smaller bubble ) = P0 + 2T/r
P2 (in bigger bubble ) = P0 + 2T/R (R>r)
∴ P1 > p2
hence air moves from smaller bubble to bigger bubble.

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