JIPMER2005PhysicsMechanical Properties of Fluids
The radius R of the soap bubble is doubled under isothermal condition. If T be the surface tension of soap bubble. The work done in doing so is given by
Options
- A32 R^2 T
- B24 R^2 T
- C8 R^2 T
- D4 R^2 T
Correct answer
A. 32 R^2 T
Step-by-step solution
Initial surface energy w₁=2 4 R^2 T=8 R^2 T Final surface energy w₂=2 4 (2 R)^2 T=32 R^2 T