12B

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1. [-I1 Points] WAUNIPHVSAV1 12.P.040. ASK YOUR TEACH ER PRACTICE ANOTHER (a) Blood with a density ,1 = 1.00 g/cm3 is owing with a speed of 24 cm/s through an aorta with a cross-sectional area of 2.2 cm2. Determine the mass ow rate (in g/s) of blood. :1 9/5 (b) If this aorta branches to a number of capillaries which have a combined crosssectional area of 2'6 x 103 cm2, determine the flow speed (in cm/s) of the blood in the capillaries cm/s 2. [-I1 Points] WAUNIPHVSAV1 12.P.048. ASK YOUR TEACH ER PRACTICE ANOTHER As a summer intern assigned to the Olympics Kayaking committee, you need to determine the speed of water owing through a rapids section of the river in order to classify the rapids. For the purposes of your calculation, you assume the river has a rectangular cross section. You determine that for the region of interest, the river narrows from a width of 14 m to a width of 5.0 m and the depth of the river decreases from 2.0 m to 0.88 in. You also know that the speed of the river before the rapids is 2.7 m/s. Determine the speed of the river through the section of rapids. :1 mxs 3. [-l1 Points] WAUNIPHVSAV1 12.P.049. ASK YOURTEACHER PRACTICE ANOTHER At a son drink bottling plant, a horizontal section of pipe carrying citric acid in liquid form goes from a cross-sectional area of 800 cm2, uid ow speed of 300 cm/s, and pressure of 1.40 X 105 Pa to a section of pipe with a crosssectional area of 3.60 cmz. The density of the citric acid is 1660 kg/m3. For the section of smaller pipe, determine the liquid ow speed and the liquid pressure. (a) the liquid ow speed m/s (b) the liquid pressure Pa 4. [-l1 Points] (a) If it takes 2.35 min to ll a 18.0 L bucket with water owing from a garden hose of diameter 3.00 cm, determine the speed at which water is traveling through the hose. E m (b) If a nozzle with a diameter threequarters the dlameter of the hose ls attached to the hose, determlne the speed of the water leaving the nozzle. 2 m/s 5. [-I1 Points] WAUNIPHYSAV1 1Z.P.039. WAUNIPHYSAV1 1Z.P.050. ASK YOUR TEACHER PRACTICE ANOTHER ASK YOUR TEACHER PRACTICE ANOTHER A veterinarian uses a hypodermic syringe like the one shown in the figure to inject a horse with a medical solution with a density that is the same as water. The barrel of the syringe has a cross-sectional area of 2.13 X 10'5 m2 and before she exerts any force on the plunger, the pressure everywhere in the syringe is 1.00 atm. when she exerts a force with a magnitude of 2.55 N on the plunger, the medical solution squirts horizontally from the needle. Determine the speed of the solution as it leaves the needle. E m 6. [-/1 Points] WAUNIPHYSAV1 12.P.059.TUTORIAL. ASK YOUR TEACHER PRACTICE ANOTHER Water is flowing into a factory in a horizontal pipe with a radius of 0.0153 m at ground level. This pipe is then connected to another horizontal pipe with a radius of 0.0400 m on a oor of the factory that is 12.6 m higher. The connection is made with a vertical section of pipe and an expansion joint. Determine the volume ow rate that will keep the pressure in the two horizontal pipes the same. EMS @Tutorlal 7. [-/1 Points] DETAILS WAUNIPHYSAV1 12.P.062. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A cylindrical bucket sitting on the edge of a table has a 3.10 mm diameter hole near the bottom. Water squirts out the hole as shown in the figure below. If the height of the table is H = 1.10 m, determine the height h of the water level in the bucket. cm H 0.800 m8. [-/1 Points] DETAILS WAUNIPHYSAV1 12.P.053. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A refinery uses a Venturi tube like the one shown in the figure to monitor the flow of gasoline (p = 7.00 x 102 kg/ms) through a hose. The inlet radius of the Venturi tube is 2.00 cm, the outlet radius is 1.50 cm, and the difference in pressure measured by the two gauges is P1 - P2 = 1.90 kPa. (a) Determine the speed of the gas as it leaves the Venturi tube. m/s (b) Determine the volume flow rate of the gasoline. m3/s 9. [-/1 Points] DETAILS WAUNIPHYSAV1 12.P.056. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A garden hose with a small puncture is stretched horizontally along the ground. The hose is attached to an open water faucet at one end and a closed nozzle at the other end. As you might suspect, water pressure builds up and water squirts vertically out of the puncture to a height of 0.49 m. Determine the pressure inside the hose. (Enter your answer to the nearest 1000 Pa.) Pa10. [-/1 Points] DETAILS WAUNIPHYSAV1 12.P.060. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A small jet airplane has a total wing area of 85.0 m and a mass of 8.03 x 104 kg. (a) If this jet is in horizontal flight, determine the pressure difference between the lower and upper surfaces of the wings. Pa (b) When the speed of air traveling over the wing is 247 m/s, determine the speed of air under the wing. Use 1.29 kg/m as the density of air. m/s (c) Why do all aircraft have a maximum operational altitude? The density of air decreases with higher altitude, which decreases the pressure difference until it cannot support the aircraft. The density of air increases with higher altitude, which decreases the pressure difference until it cannot support the aircraft. O The density of air decreases with higher altitude, which increases the pressure difference until it cannot support the aircraft. The density of air increases with higher altitude, which increases the pressure difference until it cannot support the aircraft