 June 1997, Part 3
 1 2 3 4
41. The driver of a car sounds the horn while traveling toward a stationary person. Compared to the sound of the horn heard by the driver, the sound heard by the stationary person has
1. lower pitch and shorter wavelength
2. lower pitch and longer wavelength
3. higher pitch and shorter wavelength
4. higher pitch and longer wavelength
 1 2 3 4
42. The diagram below shows a ray of monochromatic light incident on an alcohol-flint glass interface. What occurs as the light travels from the alcohol into flint glass?

1. the speed of the light decreases and the ray bends toward the normal
2. the speed of the light decreases and the ray bends away from the normal
3. the speed of the light increases and the ray bends toward the normal
4. the speed of the light increases and the ray bends away from the normal
 1 2 3 4
43. The diagram below shows straight wave fronts passing through an opening in a barrier. This wave phenomenon is called

1. reflection
2. refraction
3. polarization
4. diffraction
 1 2 3 4
44. The absolute index of refraction for a substance is 2.0 for light having a wavelength of 5.9 x 10-7 meter. In this substance, what is the critical angle for light incident on a boundary with air?
1. 30. degrees
2. 45 degrees
3. 60. degrees
4. 90. degrees
 1 2 3 4
45. A ray of monochromatic light (wavelength = 5.9 x 10-7 meter) traveling in air is incident on an interface with a liquid at an angle of 45 degrees, as shown in the diagram below. If the absolute index of refraction of the liquid is 1.4, the angle of refraction for the light ray is closest to

1. 10. degrees
2. 20. degrees
3. 30. degrees
4. 40. degrees
 1 2 3 4
46. Which phenomenon can occur with light, but not with sound?
1. interference
2. polarization
3. refraction
4. the Doppler effect
 1 2 3 4
47. As shown in the diagram below, speakers S size="-2">1 and S size="-2">2, separated by a distance of 0.50 meter, are producing sound of the same constant frequency. A person walking along a path 4.0 meters in front of the speakers hears the sound reach a maximum intensity every 2.0 meters. What is the wavelength of the sound produced by the speakers?

1. 1.0 m
2. 0.063 m
3. 0.25 m
4. 4.0 m
 1 2 3 4
48. Which diagram below best represents light emitted from a coherent light source? 1 2 3 4
49. When 8.0-electronvolt photons strike a photoemissive surface, the maximum kinetic energy of the ejected photoelectrons is 6.0 electronvolts. The work function of the photoemissive surface is
1. 0.0 eV
2. 2.0 eV
3. 7.0 eV
4. 14.0 eV
 1 2 3 4
50. If the momentum of a particle is 1.8 x 10-22 kilogram-meter per second, its matter wavelength is approximately
1. 1.2 x 10-55 m
2. 2.7 x 1011 m
3. 3.7 x 10-12 m
4. 5.0 x 10-7 m
 1 2 3 4
51. The threshold frequency of a photoemissive surface is 7.1 x 1014 hertz. Which electromagnetic radiation, incident upon the surface, will produce the greatest amount of current?
 1 2 3 4
52. Which diagram shows a possible path of an alpha particle as it passes very near the nucleus of a gold atom? 1 2 3 4
53. A hydrogen atom could have an electron energy-level transition from n = 2 to n = 3 by absorbing a photon having an energy of
1. 1.51 eV
2. 1.89 eV
3. 4.91 eV
4. 10.20 eV

Note that questions 54 and 55 have only three choices.
 1 2 3
54. A bicyclist accelerates from rest to a speed of 5.0 meters per second in 10. seconds. During the same 10. seconds, a car accelerates from a speed of 22 meters per second to a speed of 27 meters per second. Compared to the acceleration of the bicycle, the acceleration of the car is
1. less
2. greater
3. the same
 1 2 3
55. A student drops two eggs of equal mass simultaneously from the same height. Egg A lands on the tile floor and breaks. Egg B lands intact, without bouncing, on a foam pad lying on the floor. Compared to the magnitude of the impulse on egg A as it lands, the magnitude of the impulse on egg B as it lands is
1. less
2. greater
3. the same  1 2 3 4
56. In which diagram do the arrows best represent the path of a satellite in a geosynchronous orbit? 1 2 3 4 Base your answers to questions 58 through 60 on the information and diagram below. A 4.0-kilogram model airplane travels in a horizontal circular path of radius 12 meters at a constant speed of 6.0 meters per second.

 1 2 3 4
58. At the position shown, what is the direction of the net force acting on the airplane?
1. north
2. south
3. east
4. west
 1 2 3 4
59. What is the magnitude of the centripetal acceleration of the airplane?
1. 0.50 meters per second squared
2. 2.0 meters per second squared
3. 3.0 meters per second squared
4. 12 meters per second squared
 1 2 3 4
60. If the speed of the airplane is doubled and the radius of the path remains unchanged, the magnitude of the centripetal force acting on the airplane will be
1. half as much
2. twice as much
3. one-fourth as much
4. four times as much Additional Tests
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