(a) A pitot static tube is used to measure the velocity of air flowing through a duct. The manometer shows a difference in head of 10cm of water. If the density of air and water are 1.2kg/m3 and 900kg/m3 determine the velocity of air (whole numbers in m/s ). Coefficient of the pitot tube is 0.98 and gravitational constant is 9.8m/s2. Assume 141 [2] (b) Explain in short about the following terms: Freeze out sampling, Corona, Inertial impaction [1+1+1=3]