Write shorts notes on the oscillations of liquid column in U-tube.

Explanation

Consider a U-shaped glass tube which consists of two open arms with uniform crossectional area A. Let us pour - viscous uniform incompressible liquid of density ` rho` in the U - shaped surface will be in equlibrium position O. It means the pressure as measured at any point on the liquid is the same and also at the surface on the arm ( edge of the tube on either side ) ,which balances with the atmospheric press ,Due to this the level of liquid in each arm will be the same .By blowing air one can provide sufficient force in one arm , and the liquid gets disturbed from equilibrium position O, which means , the pressure at blown arm is higher than the other arm this creates difference in pressure in pressure which will cause the liquid to oscialate for a very short duration of time about the mean or equilibrium position and finally comes to rest .Time period of the oscillation is
`T= 2 pi sqrt((l)/( 2g))` second