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piper The viscosity of glycerin is 18 x 10-3 lb s/ft2 and the density is 2.44 lb/ft3. 2. What is the flow rate in liters per second through a pipe 32 cm in diameter, if the average velocity is 2.1 m/s? 3. If a pipe changes from a diameter of 17 to 11 cm, and the velocity in the 17cm section is 5.4 m/s, what is the average velocity in the 11cm section? 4. If the height of a column of water h in Figure 9.3(b) is 4.3m, what is the pressure at P2? Assume the areas at points 2 and 3 are 29 cm2 and 17 cm2, respectively? 5. What is the head loss in a 5-cm diameter pipe that is 93m long? The friction factor is 0.03, and the average velocity in the pipe is 1.03 m/s. 6. Fluid is flowing at 3.7 ft/s through one-inch fittings as follows: 7 * 90° ells, 5 tees, 2 gate valves, and 19 couplings. What is the head loss? 7. A 7.3-in diameter ball is traveling through the air with a velocity of 91 fts. If the density of the air is 0.0765 lb/ft3 and CD = 0.35, what is the force acting on the ball?