MHT CET202617 April 2026Evening ShiftPhysicsMechanical Properties of FluidsActual
The excess pressure inside the first soap bubble is three times that inside the second soap bubble. The ratio of the volume of the first soap bubble to the volume of the second soap bubble is
Options
- A3 : 4
- B1 : 3
- C1 : 9
- D1 : 27
Correct answer
D. 1 : 27
Step-by-step solution
The excess pressure inside a soap bubble of radius R and surface tension T is given by P = 4T R . Given P₁ = 3P₂ . 4T R₁ = 3 ( 4T R₂ ) R₁ R₂ = 1 3 The volume of a soap bubble is V = 4 3 R^3 . The ratio of their volumes is V₁ V₂ = ( R₁ R₂ )^3 = ( 1 3 )^3 = 1 27 . Thus, the ratio of the volumes is 1 : 27 . Answer: 1 : 27