Physics Sound Test
The wavelength of the fundamental frequency of a vibrating string of length L is
2L
High pressure, low pressure
Compression, rarefaction
Intensity is equal to
Power / 4pir^2
If you are on a train, how will the pitch of the train's whistle sound to you as the train moves?
The pitch will not change (you are inside the train)
The Doppler effect occurs with
all waves
The property of sound called intensity is proportional to the rate at which energy flows through
an area perpendicular to the direction
beats
at fixed points there is an alternation in loudness
Which of the following is the region of a sound wave in which the density and pressure are greater than normal?
compression
Audible sound waves
frequencies between 20 and 20 000 Hz
Pitch depends on the ______ of a sound wave
frequency
The quality of a musical tone of a certain pitch results from a combination of
harmonics
A train moves down the track toward an observer. The sound from the train, as heard by the observer is ______ the sound heard by a passenger on the train
higher in pitch than
less than 20 Hz
infrasonic
Sound waves are
longitudinal waves
speed of sound depends on the
medium
The distance between wave fronts of plane waves corresponds to ______ of a sound wave
one wavelength
The highness or lowness of a sound is perceived as
pitch
At a large distance from a sound source, spherical wave fronts are viewed as
plane waves
The trough of the sine curve used to represent a sound wave corresponds to
rarefaction
When the frequency of a force applied to a system matches the natural frequency of vibration of the system, ________ occurs
resonance
In general, sound travels faster through
solids than gases
For a standing wave in an air column in a pipe that is open at both ends, there must be at least
two antinodes and one node
more than 20 000 Hz
ultrasonic
Fundamental frequency is equal to
velocity / 2L