1988 Physics B - Multiple-Choice

56 a nucleus of tritium contains 2 neutrons and i

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(E) Light leaving a source at Y and traveling to X would follow the same path shown above, but in reverse. 56. A nucleus of tritium contains 2 neutrons and I proton. If the nucleus undergoes beta decay, emitting an electron, the nucleus is transmuted into (A) the nucleus of an isotope of helium (B) the nucleus of an isotope of lithium (C) an alpha particle (D) a triton (E) a deuteron 57. Charges + Q and - 4Q are situated as shown above. The net electric field is zero nearest which point? (A) A (B) B (C) C (D) D (E) E
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1988 AP Physics Multiple choice test Copyright © 1988 by College Entrance Examination Board. All rights reserved. College Board, Advanced Placement Program, AP, SAT, and the acorn logo are registered trademarks of the College Entrance Examination Board. 58. When an object of weight W is suspended from the center of a massless string as shown above. the tension at any point in the string is (A) 2Wcos T (B) ½Wcos T (C) Wcos T (D) W/(2cos T ) (E) W/cos T 59. A positive charge of 10 -6 coulomb is placed on an insulated solid conducting sphere. Which of the following is true? (A) The charge resides uniformly throughout the sphere. (B) The electric field inside the sphere is constant in magnitude, but not zero. (C) The electric field in the region surrounding the sphere increases with increasing distance from the sphere. (D) An insulated metal object acquires a net positive charge when brought near to, but not in contact with, the sphere. (E) When a second conducting sphere is connected by a conducting wire to the first sphere, charge is transferred until the electric potentials of the two spheres are equal. 60. An object weighing 4 newtons swings on the end of a string as a simple pendulum. At the bottom of the swing, the tension in the string is 6 newtons. What is the magnitude of the centripetal acceleration of the object at the bottom of the swing? (A) 0 (B) 0.5 g (C) g (D) 1.5 g (E) 2.5 g 61. A satellite of mass M moves in a circular orbit of radius R at a constant speed v Which of the following must be true? I. The net force on the satellite is equal to MR and is directed toward the center of the orbit. II. The net work done on the satellite by gravity in one revolution is zero. III. The angular momentum of the satellite is a constant. (A) I only (B) III only (C) I and II only (D) II and III only (E) I, II, and III 62. A truck traveled 400 meters north in 80 seconds, and then it traveled 300 meters east in 70 seconds. The magnitude of the average velocity of the truck was most nearly (A) 1.2 m/s (B) 3.3 m/s (C) 4.6 m/s (D) 6.6 m/s (E) 9.3 m/s 1988 AP Physics Multiple choice test Copyright © 1988 by College Entrance Examination Board. All rights reserved. College Board, Advanced Placement Program, AP, SAT, and the acorn logo are registered trademarks of the College Entrance Examination Board. 63. A projectile is fired with initial velocity vo at an angle T 0 with the horizontal and follows the trajectory shown above. Which of the following pairs of graphs best represents the vertical components of the velocity and acceleration. v and a, respectively, of the projectile as functions of time t?
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