1988 Physics B - Multiple-Choice

A train whistle has a frequency of 100 hertz as heard

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A train whistle has a frequency of 100 hertz as heard by the engineer on the train. Assume that the velocity of sound in air is 330 meters per second. If the train is approaching a stationary listener on a windless day at a velocity of 30 meters per second, the whistle frequency that the listener hears is most nearly (A) 90 Hz (B) 110 Hz (C) 120 Hz (D) 240 Hz (E) 300 Hz
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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. 31. The image of the arrow is larger than the arrow itself in which of the following cases? (A) I only (B) II only (C) I and III only (D) II and III only (E) I, II and III 32. Two sinusoidal functions of time are combined to obtain the result shown in the figure above. Which of the following can best be explained by using this figure? (A) Beats (B) Doppler effect (C) Diffraction (D) Polarization (E) Simple harmonic motion 33. A postage stamp is placed 30 centimeters to the left of a converging lens of focal length 60 centimeters. Where is the image of the stamp located? (A) 60 cm to the left of the lens (B) 20 cm to the left of the lens (C) 20 cm to the right of the lens (D) 30 cm to the right of the lens (E) 60 cm to the right of the lens 34. The nuclear reaction X o Y + Z occurs spontaneously. If M x , M Y , and M Z are the masses of the three particles. which of the following relationships is true'? (A) M x < M y - M z (B) M x < M y + M z (C) M x > M y + M z (D) M x - M y < M z (E) M x - M z < M y 35. 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. 35. Which of the following graphs best represents the de Broglie wavelength O of a particle as a function of the linear momentum p of the particle? 36. All of the following are properties of x-rays EXCEPT: (A) They penetrate light materials. (B) They ionize gases. (C) They are deflected by magnetic fields. (D) They discharge electrified bodies. (E) They are diffracted by crystals. 37. Which of the following was one of Einstein's two basic postulates of special relativity? (A) Clocks in a moving frame of reference appear to run slow. (B) Mass and energy ale related by E = mc 2 . (C) The speed of light is the same constant in all inertial frames of reference. (D) No object can travel faster than the velocity of light. (E) The mass of an object increases with increasing velocity. 38. The half-life of 90 234 Th is 24.1 days. If 4.0 x 10 -5 kilogram of this isotope is present initially, what amount remains after 96.4 days? (A) 2.0 x 10 -5 kg (B) 1.0 x 10 -5 kg (C) 5.0 x lo-6 kg (D) 2.5 x l0 -6 kg (E) 1.2 x 10 -6 kg 1 2 1 2 1 3 1 1 4 H H H H MeV .
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