First slide

Surface tension

Question

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

Moderate

A

air flows from the bigger bubble to the smaller bubble till the sizes become equal
B

air flows from bigger bubble to smaller bubble till the sizes are interchanged
C

air flows from smaller bubble to the bigger
D

there is no flow of air

Solution

We know that the excess of pressure inside the soap bubble is inversely proportional to radius of soap bubble, i.e., $p \propto 1 / r$ where r is the radius of the bubble' Therefore, the pressure inside the smaller bubble is greater than inside a bigger bubble. As a result, when both bubbles are connected by a tube, the air flows from smaller bubble to bigger bubble. So, the bigger bubble grows at the expense of smaller one'

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App