A uniform solid sphere is mounted so as to rotate freely about a horizontal axis that is tangential to the sphere. If the sphere is released from rest with its center at the same height as the axis, the angular speed of the sphere about this axis is 9.3 rad/s as the sphere moves through its lowest position. What is the radius of the sphere?

Awelder using a tank of volume 7.50×10^-2 m^3 fills it with oxygen (with a molar mass of 32.0 g/mol ) at a gauge pressure of 3.30×10^5 pa and temperature of 37.1 ∘c. the tank has a small leak, and in time some of the oxygen leaks out. on a day when the temperature is 23.1 ∘c, the gauge pressure of the oxygen in the tank is 2.00×10^5 pa . a) find the initial mass of oxygen. b) find the mass of oxygen that has leaked out.