Compared to the velocity of a 400 Hz sound, the velocity of a 200 Hz sound through air is
the same
The Doppler effect is characteristic of
light, water, and sound waves
all of the above
As the temperature of the air increases, what happens to the velocity of sound? (Assume that all other factors remain constant.)
it increases
Consider an open pipe of length L. What are the wavelengths of the three lowest tones produced by this pipe?
2L, L, 2L/3
High pitched sound has a high
frequency
Double the frequency of sound and you also double its
not speed, amplitude, and wavelength
none of these
Double the frequency of a sound and you halve its
wavelength
A sound wave is a
longitudinal wave
Interference is a property of
light, sound, and water waves
all of the above
The loudness of a musical sound is a measure of the sound wave's
amplitude
In a resonating pipe which is open at one end and closed at the other, there
is a displacement node at the closed end and a displacement antinode at the open end
In a resonating pipe which is open at both ends, there
are displacement antinodes at each end
Sound travels faster in
steel
Sound waves cannot travel in
a vacuum
The source of every sound is something that is
vibrating
A sound source of high frequency emits a high
pitch
An open pipe of length L is resonating at its fundamental frequency. Which statement is correct?
The wavelength is 2L and there is a displacement node at the pipe's midpoint
The Doppler shift explains
why the siren on a police car changes its pitch as it races past us
Wave interference occurs for
light, water, and sound waves
all of the above
Suppose that a sound source is emitting waves uniformly in all directions. If you move to a point twice as far away from the source, the frequency of the sound will be
unchanged
To say that one wave is out of phase with another is to say that the waves are
out of step
A sound source approaches a stationary observer. The frequency heard by the observer is
higher than the source
A sound source departs from a stationary observer. The frequency heard by the observer is
lower than the source
At a concert the oboe is playing a long steady note as you walk away from the stage at an accelerating velocity toward the rest room. The pitch of the sound that you hear, is
continually decreasing
A Doppler effect occurs when a source of sound moves
either towards you or away from you
When sound passes from air into water
its frequency does not change
The lowest tone to resonate in an open pipe of length L is 200 Hz. Which one of the following frequencies will not resonate in the same pipe?
900 Hz
The phenomenon of beats results from sound
interference
The speed of a sound wave in air depends on
the air temperature
As a source of continuous sound approaches a constant speed, you will be aware of an apparent increasing of its
A) frequency and wavelength.
B) loudness and wavelength.
C) loudness and frequency.
D) None of the above choices are correct.
E) loudness, freq
None of the above
The approximate range of human hearing is
20 hertz to 20,000 hertz
A 340-hertz sound wave travels at 340 m/s in air with a wavelength of
1 m
Wave interference occurs for
A) None of the above choices are correct.
B) sound waves.
C) water waves.
D) light waves.
E) All of the above choices are correct.
All of the above
The pitch of a musical sound depends on the sound wave's
frequency
What determines "loudness" of a musical note?
amplitude