Question

If two soap bubbles of different radii are connected by a tube,

• A. air flows from the bigger bubble to the smaller bubble till the sizes are interchanged.
• B. air flows from bigger bubble to the smaller bubble till the sizes are interchanged
• C. air flows from the smaller bubble to the bigger.
• D. there is no flow of air.

Answer 1

Answer: (C)

air flows from the smaller bubble to the bigger.

Answer 2

The pressure inside the smaller bubble will be more $\left(P_{i} = P_{0} +\frac{4T}{r}\right)$ Therefore, if the bubbles are connected by a tube, the air will flow from smaller bubble to the bigger.