fluid and mechanics

Question 3 (Marks 25) Air (Pair = 1.20 kg/m) flows through a pipe at a rate of 120 L/s. The pipe consists of two sections of diameters 22 cm and 10 cm with a smooth reducing section with negligible friction loss. The pressure difference between the two pipe sections; 1 and 2 is measured by a water (Pw = 1000 kg/m?) manometer. Calculate the differential height of water in manometer, h. 22 cm Alr 1 10 cm 120/5 Water un