- Abington Heights High School
**Chapter 9 - Practice Quiz 2**- Select the answer that best completes the question.
**1.**A swimming pool has the dimensions shown in the drawing. It is filled with water to a uniform depth of 8.00 m.

The density of water = 1.00 ´ 10^{3}kg/m^{3}.R-1 Ref 11-2 What is the total force exerted on the bottom of the swimming pool?

**A.**2.40 ´ 10 ^{7}N**B.**5.40 ´ 10 ^{7}N**C.**5.90 ´ 10 ^{7}N**D.**7.50 ´ 10 ^{7}N**E.**8.40 ´ 10 ^{7}N**2.**The two dams are identical with the exception that the water reservoir behind dam **A**extends twice the horizontal distance behind it as that of dam**B**. Which one of the following statements regarding these dams is correct?

**A.**The force exerted by the water on dam **A**is greater than that on dam**B**.**B.**The force exerted by the water on dam **B**is greater than that on dam**A**.**C.**Dam **A**is more likely to collapse than dam**B**if the water level rises.**D.**Dam **B**is more likely to collapse than dam**A**if the water level rises.**E.**The horizontal distance of the water behind the two dams does not determine the force on them. **3.**A submarine is operating at 100.0 m below the surface of the ocean. If the air inside the submarine is maintained at a pressure of 1.0 atmosphere, what is the magnitude of the force that acts on the rectangular hatch 2.0 m ´ 1.0 m on the deck of the submarine?

**A.**980 N **B.**2.0 ´ 10 ^{3}N**C.**5.0 ´ 10 ^{4}N**D.**9.8 ´ 10 ^{5}N**E.**2.0 ´ 10 ^{6}N**4.**At a location where the acceleration due to gravity is 9.807 m/s ^{2}, the atmospheric pressure is 9.891 ´ 10^{4}Pa. A barometer at the same location is filled with an unknown liquid. What is the density of the unknown liquid if its height in the barometer is 1.163 m?

**A.**210 kg/m ^{3}**B.**4336 kg/m ^{3}**C.**5317 kg/m ^{3}**D.**8672 kg/m ^{3}**E.**9688 kg/m ^{3 }**5.**A column of water of height 70.0 cm supports a column of an unknown liquid as suggested in the figure (not drawn to scale). Assume that both liquids are at rest and that the density of water is 1.0´ 10 ^{3}kg/m^{3}. Determine the density of the unknown liquid.

**A.**3.9 ´ 10 ^{2}kg/m^{3}**B.**^{1.2 ´}^{ 103}kg/m^{3}**C.**2.6 ´ 10 ^{3}kg/m^{3}**D.**3.3 ´ 10 ^{3}kg/m^{3}**E.**3.9 ´ 10 ^{3}kg/m^{3}**6.**A woman is enjoying a tropical drink while lying on a beach. The acceleration due to gravity at her location is 9.85 m/s ^{2}. What gauge pressure must exist in the woman's mouth if she is drinking through a straw extending 0.085 m above the surface of the drink?**Note**: Assume the drink has a density of 1015 kg/m^{3}.

**A.**850 Pa **B.**970 Pa **C.**1100 Pa **D.**2100 Pa **E.**1.0 ´ 10 ^{5}Pa**7.**A barometer is taken from the base to the top of a 279-m tower. Assuming the density of air is 1.29 kg/m ^{3}, what is the measured change in pressure?

**A.**359 Pa **B.**927 Pa **C.**2120 Pa **D.**2730 Pa **E.**3530 Pa **8.**The largest barometer ever built was an oil-filled barometer constructed in Leicester, England in 1991. The oil had a height of 12.2 m. Assuming a pressure of 1.013 ´ 10 ^{5}Pa, what was the density of the oil used in the barometer?

**A.**798 kg/m ^{3}**B.**847 kg/m ^{3}**C.**981 kg/m ^{3}**D.**1150 kg/m ^{3 }**E.**1210 kg/m ^{3 }**9.**Complete the following sentence: The operation of a hydraulic jack is an application of

**A.**Pascal's principle. **B.**Bernoulli's principle. **C.**Archimedes' principle. **D.**irrotational flow. **E.**the continuity equation. **10.**A u-shaped tube is connected to a flexible tube that has a membrane-covered funnel on the opposite end as shown in the drawing. Jason finds that no matter which way he orients to membrane, the height of the liquid in the u-shaped tube does not change. Which one of the following choices best describes this behavior?

**A.**Archimedes' principle **B.**Bernoulli's principle **C.**continuity equation **D.**irrotational flow **E.**Pascal's principle **11.**Which one of the following statements concerning a completely enclosed fluid is true?

**A.**Any change in the applied pressure of the fluid produces a change in pressure that depends on direction. **B.**The pressure at all points within the fluid is independent of any pressure applied to it. **C.**Any change in applied pressure produces an equal change in pressure at all points within the fluid. **D.**An increase in pressure in one part of the fluid results in an equal decrease in pressure in another part. **E.**The pressure in the fluid is the same at all points within the fluid. **12.**A force of 250 N is applied to a hydraulic jack piston that is 0.01 m in diameter. If the piston which supports the load has a diameter of 0.10 m, approximately how much mass can be lifted by the Ignore any difference in height between the pistons.

**A.**255 kg **B.**500 kg **C.**800 kg **D.**2550 kg **E.**6300 kg **13.**In a car lift, compressed air with a gauge pressure of 4.0 ´ 10 ^{5}Pa is used to raise a piston with a circular cross-sectional area. If the radius of the piston is 0.17 m, what is the maximum mass that can be raised using this piston?

**A.**530 kg **B.**3700 kg **C.**9800 kg **D.**22 000 kg **E.**41 000 kg **14.**Which one of the following statements concerning the buoyant force on an object submerged in a liquid is true?

**A.**The buoyant force depends on the mass of the object. **B.**The buoyant force depends on the weight of the object. **C.**The buoyant force is independent of the density of the liquid. **D.**The buoyant force depends on the volume of the liquid displaced. **E.**The buoyant force will increase with depth if the liquid is incompressible.

This is the end of the test. When you have completed all the questions and reviewed your answers, press the button below to grade the test.**15.**A 2-kg block displaces 10 kg of water when it is held fully immersed. The object is then tied down as shown in the figure; and it displaces 5 kg of water. What is the tension in the string?

**A.**10 N **B.**20 N **C.**30 N **D.**70 N **E.**100 N