Waves & Sound Review
Click on the correct answer
1
The time needed to complete one cycle is its
frequency
period
wavelength
velocity
amplitude
2
Which of the following is a longitudinal wave?
light
radio wave
sound
all of these
none of the above
3
Two waves arrive at the same place at the same time in phase with each other. If each wave has an amplitude of 4 m, what is the amplitude of the resulting wave?
4m
8 m
0 m
6 m
4
Where can you touch a wave without disturbing the wave?
node
antinode
none of the above.
5
During a single period, the distance traveled by a wave is
1/2 wavelength
1 wavelength
2 wavelengths
6
The source of all wave motion is
a motor
a vibrating object
a slinky
sound
7
A pendulum has a length of 1.5 m and is measured to have a 5 second period. what is the value of gravity for this location?
9.8 m/s/s
2.4 m/s/s
1.5 m/s/s
0.5 m/s/s
8
The phenomenon of beats results from sound
refraction
reflection
interference
all of the above
none of the above
9
A 120 cm closed tube resonates with the frequency of the third harmonic. The wavelength of the third harmonic is
60 cm
120 cm
240 cm
160 cm
10
Two whistles produce sounds of wavelengths 3.4 m and 3.3 m. What is the beat frequency produced?
0.1 Hz
1.0 Hz
2.0 Hz
3.0 Hz
4.0 Hz
11
The speed of a sound wave depends on
its frequency
its wavelength
the material in which it travels
12
Sound travels faster in air if the air is
warm
cold
neither warm or cold
13
Two waves with the same speed have different wavelengths. Which has the higher frequency? The one with the
longer wavelength
shorter wavelength
smaller amplitude
larger amplitude
14
If the speed of sound in air is 340 m/s, what is the wavelength of a 170 Hz tuning fork?
2 m
1 m
0.5 m
0.0 m
3 m
15
The singer Aretha Franklin is said to have made a cr4ystal wineglass shatter with her voice. This is a demonstration of
an echo
sound refraction
beats
resonance
interference
16
The wavelength of the second harmonic for standing waves on a rope fixed at both ends is ___ the length of the rope.
four times
two times
the same as
one half
17
Two standing waves are created on a rope. One has a shorter wavelength than the other. The frequency of the one with the shorter wavelength will be_____ the frequency of the one with the longer wavelength.
equal to
smaller than
larger than
unable to determine.
18
If the fundamental frequency of a rope fixed at both ends is 20 Hz, the frequency of the second harmonic is
5 Hz
10 Hz
20 Hz
40 Hz
19
Two notes which have a frequency ratio of 2:1 are said to be separated by an octave. A note which is separated by an octave from middle C (256 Hz) is
128 Hz
254 Hz
258 hz
345 Hz
none of these
20
The pitch of a sound refers to the __________ of the sound wave.
wavelength
velocity
frequency
amplitude
21
Sound waves are known to exhibit the Doppler effect. This means that
the frequency of any harmonic is a multiple of the first harmonic
the speed of sound waves is dependent only upon the properties of that medium
the amplitude decreases with time
sound waves can force other objects into vibrating at their natural frequency
the perceived pitch from a moving source is different that the actual frequency