Consider two concentric thin wall steel tubes, the larger one closed at the bott
ID: 1856261 • Letter: C
Question
Consider two concentric thin wall steel tubes, the larger one closed at the bottom and the inner one open. The tubes are filled with a fluid. A well fitting cylinderical plug that slides easily is dropped in the inner tube and a well fitting annular ring (doughnet) which slides easily is dropped between the two tubes. The weights of both plugs are the same. After osillating a litle the plugs settle concentrically with one another another as shown. What must be the relationships between the radii of the tubes.Explanation / Answer
if height of both the plugs are same, then pi*r1^2=pi*(r2^2-r1^2), which implies, r2=1.414r1