[" A tube with thin but uniform cross section has two arms,one straight,"],[" other shapped as a semicicle of radius "r" .Initially both arms carry an "],[" idealfluid upto a height R.Now the equilibrium is disturbed by pushing "],[" the fluid in the left am by a small amount.Fluid is then released and "],[" allowed oscillate.Neglect any friction or viscous forces.If the time "],[" period of oscillations is found to be "T=pi sqrt((nR)/(3g))(pi+n)" ; find the integer "],[" value "n.]