Review for Test
#1: Phy 101
Spring
2004 RBF
1) Unlike a transverse wave, a longitudinal wave
has
A) no amplitude.
B) no frequency.
C) no wavelength.
D) no speed.
E) ...a
longitudinal wave has all of these.
2) Which of the following is not a transverse
wave?
A) Sound.
B) Light.
C) Radio.
D) All of these.
E) None of these.
3) The vibrations of a longitudinal wave move in
a direction
A) along the
direction of wave travel.
B) at right angles
to the direction of wave travel.
Figure 18A-1
4) Radio waves travel at the speed of light,
300,000 km/s. The wavelength of a radio wave
received at 100 megahertz is
A) 0.3 m.
B) 3.0 m.
C) 30 m.
D) 300 m.
E) none of these.
5) If
the frequency of a certain wave is 10 hertz, its period is
A) 0.1 seconds. B)
10 seconds. C) 100 seconds. D) none of these.
6) To
say that one wave is out of phase with another is to say that the waves are
A) of different
amplitudes.
B) of different
frequencies.
C) of different
wavelengths.
D) out of step.
E) all of these.
7) A
standing wave occurs when
A) two waves
overlap.
B) a wave reflects
upon itself.
C) the speed of
the wave is zero or near zero.
D) the amplitude
of a wave exceeds its wavelength.
8) The Doppler effect is characteristic of
A) water waves.
B) sound waves.
C) light waves.
D) all of these.
E) none of these.
9) An
observer on the ground hears a sonic boom which is created by an airplane
flying
at a speed
A) just below the
speed of sound.
B) equal to the
speed of sound.
C) greater than
the speed of sound.
D) all of these.
E) none of these.
10) A
floating leaf oscillates up and down two complete cycles each second as a water
wave
passes by. What is the wave's frequency?
A) 0.5 hertz. B)
1 hertz. C) 2 hertz. D) 3 hertz. E) 6 hertz.
11) A
wave travels an average distance of 6 meters in one second. What is the wave's
velocity?
A) less than 0.2
m/s.
B) 1 m/s.
C) 3 m/s.
D) 6 m/s.
E) more than 6
m/s.
12) A
floating object oscillates up and down 2 complete cycles in 1 second as a water
wave of wavelength 5 meters passes by. The speed of the wave is
A) 2 m/s.
B) 5 m/s.
C) 10 m/s.
D) 15 m/s.
E) none of these.
13) The source of every sound is something that is
A) vibrating.
B) moving.
C) accelerating.
D) undergoing
simple harmonic motion.
E) a net emitter
of energy.
14) Double the frequency of a sound and you halve
its
A) wavelength.
B) speed.
C) amplitude.
D) all of these.
E) none of these.
15) The range of human hearing is from about
A) 10 hertz to 10,000
hertz.
B) 20 hertz to
20,000 hertz.
C) 40 hertz to
40,000 hertz.
D) actually all of
these, depending on the person.
16) A
sound wave is a
A) longitudinal
wave.
B) transverse
wave.
C) standing wave.
D) shock wave.
E) none of these.
17) Sound waves cannot travel in
A) air.
B) water.
C) steel.
D) a vacuum.
E) sound can
travel in all of these.
18) A
wave having a frequency of 1000 hertz vibrates at
A) less than 1000
cycles per second.
B) 1000 cycles per
second.
C) more than 1000
cycles per second.
19) Reverberation is actually a case of
A) sound
interference.
B) forced
vibrations.
C) re-echoed
sound.
D) resonance.
E) none of these.
20) The explanation for refraction must involve a
change in
A) frequency.
B) wavelength.
C) speed.
D) all of these.
E) none of these.
21) The frequencies of sound that carry farther in
air are relatively
A) low. B) high. C) no difference.
22) The natural frequency of an object depends on
its
A) elasticity. B)
size and shape.
C) both of these.
D) neither of these.
23) The object with the higher natural frequency
is a
A) small bell. B)
large bell.
24) Caruso is said to have made a crystal
chandelier shatter with his voice.
This is
a demonstration of
A) an echo.
B) sound
refraction.
C) beats.
D) resonance.
E) interference.
25) Which doesn't belong to the same family?
A) Infrasonic
waves.
B) Ultrasonic
waves.
C) Radio waves.
D) Shock waves.
E) Longitudinal
waves.
26) For AM radio, the A stands for
A) acceleration.
B) authorized.
C) amplitude.
D) agony.
E) almost.
27) A
340-hertz sound wave travels at 340 m/s in air with a wavelength of
A) 1 m.
B) 10 m.
C) 100 m.
D) 1000 m.
E) none of these.
28) In
which one of these does sound travel the fastest?
A) water vapor.
B) water.
C) ice.
D) steam.
E) ...sound
travels the same speed in each of these.
29) Beats are produced when two tuning forks, one
of frequency 240 hertz and the other of
frequency 246 hertz are sounded together. The
frequency of the beats is
A) 6 hertz.
B) 12 hertz.
C) 240 hertz.
D) 245 hertz.
E) none of these.
30) Repeatedly tap the side of a drinking glass
with a spoon while filling it with water
and you
will notice that the pitch of the sound
A) increases.
B) decreases.
C) remains
relatively constant.
31) A
piano tuner knows that a key on the piano is tuned to the frequency of his
tuning fork
when he
strikes them at the same time and the number of beats he hears each second is
A) 0. B) 1. C) 2. D) 3. E) 4.
32) The pitch of a musical sound depends on the
sound wave's
A) wavelength.
B) frequency.
C) speed.
D) amplitude.
E) all of these.
33) A
decibel is a measure of a sound's
A) frequency.
B) wavelength.
C) speed.
D) loudness.
E) all of these.
34) The quality of a musical note has to do with
its
A) loudness.
B) frequency.
C) harmonics.
D) amplitude.
E) all of these.
35) Reverberation is a phenomenon you would be
most likely to hear if you sing in the
A) shower. B)
desert.
36) The frequency of a note one octave higher in
pitch than a 440-Hz note is
A) 1760 Hz. B)
880 Hz. C) 440 Hz. D) 220 Hz. E) 110 Hz.
37) Fourier discovered that periodic waves can be
represented by
A) a series of
non-periodic waves.
B) the summation
of a series of simple sine waves.
C) a binary code.
38) Compared to a sound of 40 decibels, a sound of
50 decibels is
A) 10 times as intense.
B) 100 times as
intense.
C) 1000 times as
intense.
D) 10,000 times as
intense.
E) more than
10,000 times as intense.
39) A
cello string 0.75 m long has a fundamental frequency of 220 hertz.
The
speed of a wave on the string is
A) 165 m/s.
B) 220 m/s.
C) 294 m/s.
D) 330 m/s.
E) none of these.
Figure 20A-1
40) The longitudinal waves shown above all have
the same speed. If they are sound waves,
which
corresponds to the highest pitch?
A) I B) II C) III D) IV E) V
41) Resonance can be looked at as forced vibration
with the
A) least amount of
energy input.
B) maximum amount
of energy input.
C) matching of
wave amplitudes.
D) matching of
constructive and destructive interference.
E) minimum beat
frequency.
42) Inhaling helium increases the pitch of your
voice. The reason for this is that sound
travels
A) slower in
helium than in air.
B) faster in
helium than in air.
C) the same speed
in helium, but the wavelength is greater.
1) Answer: E
2) Answer: A
3) Answer: A
4) Answer: B
5) Answer: A
6) Answer: D
7) Answer: B
8) Answer: D
9) Answer: C
10) Answer: C
11) Answer: D
12) Answer: C
13) Answer: A
14) Answer: A
15) Answer: B
16) Answer: A
17) Answer: D
18) Answer: B
19) Answer: C
20) Answer: C
21) Answer: A
22) Answer: C
23) Answer: A
24) Answer: D
25) Answer: C
26) Answer: C
27) Answer: A
28) Answer: C
29) Answer: A
30) Answer: B
31) Answer: A
32) Answer: B
33) Answer: D
34) Answer: C
35) Answer: A
36) Answer: B
37) Answer: B
38) Answer: A
39) Answer: D
40) Answer: A
41) Answer: A
42) Answer: B