24.A pop-gun consists of a cylindrical barrel 3 cm2 in cross section closed at one end by a cork and having a well fitting piston at the other.If the piston is pushed slowly in the cork is finally ejected,giving a pop,the frequency of which is found to be 512HZAssuming that the initial distance between the cork and the piston was 25cm and that there is no leakage of air, calculate the force required toejectthe cork.Atmospheric pressure =1kg/cm2,v=340m/s)
