Oxygen is to be fed to a reactor at a constant rate of 10lbm/s from a storage tank in which the pressure is constant at 100 psig and the temperature is 708F. The pressure in the reactor fluctuates...

Oxygen is to be fed to a reactor at a constant rate of 10lbm/s from a storage tank in which the pressure is constant at 100 psig and the temperature is 708F. The pressure in the reactor fluctuates between 2 and 10 psig, so you want to insert a choke in the line to maintain the flow rate constant. If the choke is a 2 ft length of tubing, what should the diameter of the tubing be?