A pitot static tube is used to measure the velocity of air flowing through a duct. The manometer shows a difference in head of 10 cm of water. If the density of air and water are 1.2 kg/m and 900 kg/m determine the velocity of air (whole numbers in m/s). Coefficient of the pitot tube is 0.98 and gravitational constant is 9.8 m/s. Assume 1-p4~1 [2] (b) Explain in short about the following terms: Freeze out sampling, Corona, Inertial impaction