A glass tube with a diameter of 0.4 mm is placed in water at 20C in a cup. Surface tension of water at 20C s = 0.073 N/m. The contact angle will be taken as zero degrees. Capillary rise of water in the pipe

2.50 kg/m3 of air enters a nozzle with a 2:1 inlet/exit area ratio at a speed of 120 m/s and exits at a speed of 330 m/s. Determine the density of the air at the outlet (kg/m3).