Helium gas flows through well-insulated nozzle at steady state. The temperature and velocity at the inlet are 550 R and 150 ft/s respectively. At the exit, the temperature is 400 R and pressure is 40 lbf/in^2. The area of exit is 0.0085 ft^2. Using the ideal gas model with k=1.67, and neglecting the potential energy effects, determine the mass flow ratein lb/s through the nozzle.