
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
 lower pitch and shorter wavelength
 lower pitch and longer wavelength
 higher pitch and shorter wavelength
 higher pitch and longer wavelength


42. The diagram below shows a ray of monochromatic light incident on an alcoholflint
glass interface.
What occurs as the light travels from the alcohol into flint glass?
 the speed of the light decreases and the ray bends toward the normal
 the speed of the light decreases and the ray bends away from the normal
 the speed of the light increases and the ray bends toward the normal
 the speed of the light increases and the ray bends away from the normal


43. The diagram below shows straight wave fronts passing through an opening in a
barrier.
This wave phenomenon is called
 reflection
 refraction
 polarization
 diffraction


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?
 30. degrees
 45 degrees
 60. degrees
 90. degrees


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
 10. degrees
 20. degrees
 30. degrees
 40. degrees


46. Which phenomenon can occur with light, but not with sound?
 interference
 polarization
 refraction
 the Doppler effect


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?
 1.0 m
 0.063 m
 0.25 m
 4.0 m


48. Which diagram below best represents light emitted from a coherent light source?


49. When 8.0electronvolt 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
 0.0 eV
 2.0 eV
 7.0 eV
 14.0 eV


50. If the momentum of a particle is 1.8 x 10^{22} kilogrammeter
per second, its matter wavelength is approximately
 1.2 x 10^{55} m
 2.7 x 10^{11} m
 3.7 x 10^{12} m
 5.0 x 10^{7} m


51. The threshold frequency of a photoemissive surface is 7.1 x 10^{14 }
hertz. Which electromagnetic radiation, incident upon the surface, will produce
the greatest amount of current?
 lowintensity infrared radiation
 highintensity infrared radiation
 lowintensity ultraviolet radiation
 highintensity ultraviolet radiation


52. Which diagram shows a possible path of an alpha particle as it passes very near
the nucleus of a gold atom?


53. A hydrogen atom could have an electron energylevel transition from n
= 2 to n = 3 by absorbing a photon having an energy of
 1.51 eV
 1.89 eV
 4.91 eV
 10.20 eV

Note that questions 54 and 55 have only three choices. 

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
 less
 greater
 the same


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
 less
 greater
 the same



56. In which diagram do the arrows best represent the path of a satellite in a geosynchronous
orbit?



Base your answers to questions 58 through 60 on the information and diagram below.
A 4.0kilogram model airplane travels in a horizontal circular path of radius
12 meters at a constant speed of 6.0 meters per second.


58. At the position shown, what is the direction of the net force acting on the
airplane?
 north
 south
 east
 west


59. What is the magnitude of the centripetal acceleration of the airplane?
 0.50 meters per second squared
 2.0 meters per second squared
 3.0 meters per second squared
 12 meters per second squared


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
 half as much
 twice as much
 onefourth as much
 four times as much
