MHT CET2011PhysicsMechanical 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 it given by
Options
- A32 R ² T
- B24 R² T
- C8 R² T
- D4 R² T
Correct answer
A. 32 R ² T
Step-by-step solution
Surface energy of a bubble array l E= Tension surface area E=T A array For soap bubble array l E=2 T A E=2 T 4 R² array Here, R= radius of bubble If radius is doubled then we have array l E^ =2 T 4 R² E^ =2 T 4 (2 R)² E^ =32 R² T array