[25 marks overall] Nitrogen (=1.39) contained in a large tank at a pressure of 0.2MPa and a temperature of 300K flows steadily under adiabatic conditions into a second tank through a converging nozzle with a throat diameter of 15mm. The pressure in the second tank and at the throat of the nozzle is 140kPa. The RMM of nitrogen is 28.02g/mol. (a) [15 marks] Calculate the mass flow rate in kg/s;m=0.0755kgs1; and (b) [10 marks] Also calculate the gas speed at the nozzle exit and verify that the flow is subsonic. Ma=0.735 (subsonic); u=245.9ms1