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Chapter 14 - Chapter 14 1 All A B C D E FLUIDS uids are...

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Chapter 14: FLUIDS 1. All fl uids are: A. gases B. liquids C. gases or liquids D. non-metallic E. transparent ans: C 2. Gases may be distinguished from other forms of matter by their: A. lack of color B. small atomic weights C. inability to form free surfaces D. ability to fl ow E. ability to exert a buoyant force ans: C 3. 1 Pa is: A. 1 N / m B. 1 m / N C. 1 kg / m · s D. 1 kg / m · s 2 E. 1 N / m · s ans: D 4. Mercury is a convenient liquid to use in a barometer because: 5. To obtain the absolute pressure from the gauge pressure: 206 Chapter 14: FLUIDS
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6. Barometers and open-tube manometers are two instruments that are used to measure pressure. 7. To measure moderately low pressures oil with a density of 8 . 5 × 10 2 kg / m 3 is used in place of mercury in a barometer. A change in the height of the oil column of 1 . 0 mm indicates a change in pressure of about: A. 1 . 2 × 10 7 Pa B. 1 . 2 × 10 5 Pa C. 0 . 85 Pa D. 1 . 2 Pa E. 8 . 3 Pa ans: E 8. The pressure exerted on the ground by a man is greatest when: 9. The vessels shown below all contain water to the same height. Rank them according to the pressure exerted by the water on the vessel bottoms, least to greatest. . 1 . 2 . 3 . . . 4 Chapter 14: FLUIDS 207
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10. In a stationary homogeneous liquid: 11. Which of the following fi ve statements, concerning the upper surface pressure of a liquid, is FALSE? A. It is independent of the surface area B. It is the same for all points on that surface C. It would not increase if the liquid depth were increased D. It would increase if the liquid density were increased E. It would increase if the atmospheric pressure increased ans: D
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