Instructions: Part A Multiple Choice: Each question is worth different marks according to the strategy used. 1.Which item does not require liquid to operate properly? a.Torricelli tube c.aneroid barometer b.hydraulic ram d.manometer 2.In early days of barometer design, mercury replaced water primarily because a.a shorter tube could be used b.mercury is metallic and easier to see c.water evaporates easily d.metallic liquids flow more easily 3.A U-shaped tube can be easily used to make a(n) a.aneroid barometer c.thermometer b.Torricelli tube d.manometer 4.Which of the following is not a factor in determining gauge pressure in a liquid? a.density c.depth b.viscosity d.gravitational force constant 5. Absolute pressure 24 m below the surface of a freshwater lake is closest to a.240 kPa c.440 kPa b.340 kPa d.540 kPa 6. Gauge pressure 24 m below the surface of a freshwater lake is closest to a.240 kPa c.440 kPa b.340 kPa d.550 kPa 7.Water dams need to be thickest at the a.top c.bottom b.middle d.none of these; thickness is uniform 8.Given that the density of sea water is 1030 kg/m3, gauge pressure 1 km below sea level is closest to a.1.0 107 Pa c.1.0 106 Pa b.1.0 104 Pa d.1.0 105 Pa 9.Which is not a valid unit for pressure? a.kPa c.kN/cm2 b.N/m d.N/m2 10. Which device does not operate based on Pascal's principle? a.syringe c.car brakes b.hydraulic jack d.airfoil 11.In two coupled fluid cylinders, a 15-N force is applied to a cylinder of area 5.0 cm2. The force on the other cylinder of area 12 cm2 is a.75 N c.4.0 N b.36 N d.27 N 12.In two coupled fluid cylinders, a 640-N force is applied to a cylinder of area 2.0 102 m2. The pressure in the other cylinder of area 5.0 102 m2 is a.32 kPa c.13 kPa b.640 kPa d.150 kPa 13.In two coupled cylinders, one cylinder needs to have 25 times the force of the other cylinder. The diameter of the cylinder with larger force needs to be a.25 times that of the other cylinder c.5 times that of the other cylinder b.1/25 of the other cylinder d.1/5 of the other cylinder 14.In two coupled cylinders, one cylinder needs to have 16 times the force of the other cylinder. The area of the cylinder with larger force needs to be a.16 times larger than the other cylinder c.4 times larger than the other cylinder b.1/16 of the other cylinder d.1/4 of the other cylinder 15. Automotive brakes convert the kinetic energy of the car primarily into a.radiant energy c.sound energy b.thermal energy d.vibration energy Part B answer the following questions. Give your answer as well as your strategy for determining your answer. As part of your answer, give the page number in the reference material or the website that you used to find the answer to the question. 16. If a 73-kg acrobat performs a one-handed handstand on a hand of area 2.3 102 m2, what pressure is exerted on the floor? Express your answer in Pascals. 17.A manometer is filled with water ( D = 1.0 103 kg/m3 ). Pressure on one side of the manometer is increased until the gauge pressure is 3500 Pa. What is the height of the static pressure head in cm? 18.What is the absolute pressure at the bottom of a 3.0-m deep swimming pool? Assume water has a density of 1.0 103 kg/m3 and an atmospheric pressure of 101 kPa. 19. A pressure gauge reads 7.1 kPa when submerged in a liquid to a depth of 75 cm. Determine the density of the liquid. 20.Determine the gauge pressure at the base of a 92 cm column of mercury, if the density of mercury is 13 600 kg/m3