Q.
There is a small bubble at one end and bigger bubble at other end of a rod. What will happen?
A) Smaller will grow until they collapse
B) Bigger will grow until they collapse
C) Remain in equilibrium
D) None of the above
Explanation
(b) Excess the pressure inside the bubble is$\ p = 4T/r.$ So, smaller is the radius r, the larger is the excess of pressure p. It means, the pressure of air is more in bubble A than in bubble B. So, the air will go from bubble A to bubble B will grow more until they collapse.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.