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practicetestchapters9-11 - TEST 3 REVIEW PHYSICS 1401 -...

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TEST 3 REVIEW PHYSICS 1401 - Brooks MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Young's modulus is a(n) A) stress. B) breaking strength. C) strain. D) pressure limit. E) elastic modulus. Page Ref: Sec. 9.1 2) The pressure differential across a wing cross section due to the difference in air flow is explained by A) Poiseuille's law. B) Archimedes Principle. C) Kepler's law. D) Bernoulli's equation. E) Newton's third law. Page Ref: Sec. 9.4 3) Stress is A) the strain per unit length. B) applied force per cross - sectional area. C) the same as force. D) the ratio of the change in length. Page Ref: Sec. 9.1 4) A container of water is placed on a scale, and the scale reads 120. g. Now a 20.0g piece of copper (specific gravity = 8.90) is suspended from a thread and lowered into the water, not touching the bottom of the container. What will the scale now read? A) 120 g B) 122 g C) 140 g D) 112 g E) 138 g Page Ref: Sec. 9.3 5) A submarine rests on the sea bottom. The normal force exerted upon the sub by the sea - floor is equal to A) the weight of the sub less the weight of the displaced water. B) the buoyant force less 1 atmosphere acting on the sub. C) the weight of the displaced water. D) the weight of the sub plus the weight of the displaced water. E) the weight of the sub. Page Ref: Sec. 9.3 6) A sunken steel ship has a mass of 500,000 kg. It is filled with water. In order to lift the ship, air bags are to be inflated inside the hull. What volume of air is needed if 7.8 is the specific gravity of steel? A) 225 m 3 B) 436 m 3 C) 2778 m 3 D) 1266 m 3 E) 872 m 3 Page Ref: Sec. 9.3 7) All of the following are dimensionless except A) Reynolds number. B) specific gravity. C) bulk modulus. D) strain. Page Ref: Sec. 9.1 1
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8) "Pressure applied to an enclosed fluid is transmitted to every point in the fluid and to the enclosure walls" is known as A) Kepler's law. B) Fermet's principle. C) Bernoulli's principle. D) Pascal's principle. E) Archimedes' principle. Page Ref: Sec. 9.2 9) Suppose that an 80. kg person walking on crutches supports all his weight on the two crutch tips, each of which is circular with a diameter of 1.0 inch. What pressure is exerted on the floor? Express the answer in psi. A) 14. psi B) 1.1 × 10 2 psi C) 2.2 × 10 2 psi D) 56 psi E) 1.4 × 10 2 psi Page Ref: Sec. 9.2 10) Strain is A) the ratio of stress to elastic modulus. B) the stress per unit area. C) the applied force per unit area. D) the ratio of the change in length to the original length. Page Ref: Sec. 9.1 11) The density of water is A) 1.0 Mg/m 3 . B) 1.0 × 10 - 3 g/m 3 . C) 1.0 kg/m 3 . D) 1.0 × 10 3 kg/cm 3 . E) 1.0 × 10 1 kg/cm 3 . Page Ref: Sec. 9.2
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This note was uploaded on 10/05/2008 for the course PHYS 1401 taught by Professor Broyles during the Spring '08 term at Collin College.

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practicetestchapters9-11 - TEST 3 REVIEW PHYSICS 1401 -...

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