Period of Oscillation of Steel Ball

[mmmboh]

I already did the first part, and the equation for the period becomes: T=2\pi(ml/\gammaPA)^(1/2)

I know 12 litres = 0.012 m³, and the the mass of the ball is the volume of a sphere of radius 0.01m x the density = 0.0318 Kg, for pressure I am not sure whether I am suppose to use 1 atm or 101.3 kPa, that's the least of my problems though. The area of the a cross section of the tube, assuming the ball is fitted, is \pi(0.01)²=0.000314m³...So assuming all those are right, now I need the length. I thought that maybe the flask also had the same radius as the ball, and so the length would just be 0.012m³/0.0000314m³=38.2m, but when I plug all there numbers into the equation for period I don't get 1 second or anything close as the answer.

Can someone help please?

Edit: Hm...if I use 101 325 Pa as my pressure it works...can someone confirm if what I've done is right? 38.2 m seems awfully long for a flask.

 

[ehild]

The glass tube is mounted on a flask. The diameter of the tube is 2 cm. The volume of the flask is 12 l. You don't even know the shape of the flask, but its diameter definitely is not 2 cm.

ehild