A student balances a 1.5 kg broom by placing her finger 1.4 m from the end of the broom handle. 1.4 m
How far from the end of the broom handle would she have to balance the broom if she hung a 400 g
mass from the end of the broom handle?​

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.