3. (14 %) (a) A differential manometer is used to measure the drop in pressure between two points in a process line containing water. The specific gravity of the manometer fluid is 1.05. The measured levels in each arm are shown below. Calculate the pressure drop between points 1 and 2 in dynes/cm. 382 mm P = 1.00 g/cm 374 mm 1000000 2 in. -1.05 g/cm (a) (b) (b) The pressure of gas being pulled though a line by a vacuum pump is measured with an open-end mercury manometer. A reading of -2 inches is obtained. What is the gas gauge pressure in inches of mercury? What is the absolute pressure if Patm = 30 inches Hg