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Chapte 11 Physical Science Waves

True/False
Indicate whether the sentence or statement is true or false.
 

 1. 
The greater the frequency of the wave in a particular medium, the greater the speed of the wave.
 

 2. 
Light travels faster in glass than it does in a vacuum.
 

 3. 
A wave transports energy but not matter.
 

 4. 
Visible light waves require a medium in which to travel.
 

 5. 
Radio waves are an example of electromagnetic waves.
 

 6. 
Sound waves are examples of longitudinal waves.
 

 7. 
Light waves are examples of transverse waves.
 

 8. 
The energy of a mechanical wave depends on the amplitude of the wave.
 

 9. 
As the frequency of sound waves increases, the wavelength of the sound waves decreases.
 

 10. 
As the period of a wave increases, the frequency increases.
 

 11. 
In water waves, the disturbance consists of fluctuations in the density of water.
 

 12. 
The speed of sound at high altitudes, where the air is less dense, is greater than the speed of sound at low altitudes, where the air is more dense.
 

 13. 
The color of visible light depends on the wavelength of the light.
 

 14. 
Sound waves cannot travel through solids.
 

 15. 
When a wave reflects from a boundary, the only change in the wave is the direction of travel.
 

 16. 
According to the Doppler effect, light from a star moving away from Earth will have a higher frequency than light from a star moving toward Earth.
 

 17. 
When two waves are in the same place at the same time, they combine to produce a single wave.
 

 18. 
Two waves cannot occupy the same space at the same time.
 

 19. 
Nodes in a standing wave are the result of constructive interference.
 

 20. 
If two tuning forks of different frequencies are struck at the same time, you will hear beats as the result of constructive interference followed by destructive interference.
 

 21. 
When light passes from air to glass, the light may change direction due to refraction.
 

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 22. 
Sound waves
a.
require a medium.
c.
are not mechanical waves.
b.
are unrelated to vibrations.
d.
can travel in a vacuum.
 

 23. 
Light waves
a.
require a medium.
c.
are caused by a vibrating object.
b.
cannot travel through solids.
d.
are electromagnetic waves.
 

 24. 
Water waves
a.
transport energy and water.
c.
transport water but not energy.
b.
transport energy but not water.
d.
are not mechanical waves.
 

 25. 
The medium seismic waves travel through is
a.
a vacuum.
c.
air.
b.
rocks and other materials inside Earth.
d.
energy.
 

 26. 
Sound waves are
a.
transverse waves.
c.
circular waves.
b.
longitudinal waves.
d.
polarized waves.
 

 27. 
Light waves are
a.
transverse waves.
c.
rotating waves.
b.
longitudinal waves.
d.
circular waves.
 

 28. 
Water waves are
a.
longitudinal waves.
c.
mechanical waves.
b.
transverse waves.
d.
compression waves.
 
 
chapter_11_sample_files/i0310000.jpg
 

 29. 
The wavelength of the wave in the diagram is
a.
6.0 m.
c.
3 m.
b.
1.5 m.
d.
0.75 m.
 

 30. 
The amplitude of the above wave is
a.
6 m.
c.
0.5 m.
b.
3 m.
d.
1 m.
 

 31. 
A wave has a period of 0.25 seconds. The frequency of this wave is
a.
25 seconds.
c.
4 hertz.
b.
0.25 hertz.
d.
2 hertz.
 

 32. 
A man is standing on the shore of a beach, up to his knees in water. Every 5 seconds a wave breaks on him. What is the period of the wave?
a.
12 waves per minute
c.
5 seconds
b.
5 hertz
d.
0.2 hertz
 

 33. 
A child is sending pulses down a stretched rope at a rate of 2 pulses per second. The distance between the pulses is 5 meters. What is the speed of the wave?
a.
5 m/s
c.
2 Hz
b.
10 m/s
d.
2.5 m/s
 

 34. 
A train of waves is moving at a speed of 30 m/s. The frequency of the waves is 10 Hz. What is the wavelength?
a.
300 m
c.
3 m
b.
30 m
d.
0.1 m
 

 35. 
A sound wave in air has a frequency of 680 cycles per second. What is the approximate wavelength of the sound wave?
a.
680 m
c.
340 m
b.
0.5 m
d.
20 m
 

 36. 
A person is standing still and listening to a siren sounding an alarm. The frequency of the sound is 500 Hz. The person begins running toward the sound at a rate of 20 m/s. The frequency of the sound the person hears will
a.
remain the same.
c.
decrease.
b.
increase.
d.
change by 20 Hz.
 

 37. 
A wave front is
a.
the first part of a wave.
b.
a surface made up of all the points on a wave that have the same energy.
c.
a line connecting a crest and a trough.
d.
the initial disturbance of the medium.
 

 38. 
The frequency of a sound wave determines
a.
the pitch of the sound.
c.
how fast the sound travels.
b.
how loud the sound is.
d.
the magnitude of the compression.
 

 39. 
How loud a sound is depends on
a.
the wavelength of the sound.
c.
the amplitude of the waves.
b.
the pitch of the sound.
d.
the medium.
 

 40. 
The difference between visible light and X rays is that
a.
the amplitude of visible light is greater.
c.
they travel through a different medium.
b.
the speed of X rays is greater.
d.
the frequency of X rays is greater.
 

 41. 
A ____ is a good mathematical model for representing transverse waves.
a.
tangent curve
c.
exponential curve
b.
sine curve
d.
parabolic curve
 

 42. 
The color of light is determined by ____ of the light waves.
a.
the medium
c.
the frequency
b.
the speed
d.
the amplitude
 

 43. 
Which type of electromagnetic wave has the greatest wavelength?
a.
visible light
c.
radio waves
b.
microwaves
d.
X rays
 

 44. 
The frequency of a sound wave is determined by the
a.
source of the wave.
c.
speed of the wave.
b.
amplitude of the wave.
d.
medium of the wave.
 

 45. 
A wave x meters long has a speed of y meters per second. The frequency of the wave is
a.
x/y
c.
y·x
b.
y/x
d.
y + x
 

 46. 
A wave with a frequency of 0.5 Hz and a speed of 10 m/s has a wavelength of
a.
50 m.
c.
20 m.
b.
0.5 m.
d.
0.2 m.
 



 
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