PSSI: Chapter 10 Quiz
A weight suspended from a spring bobs up and down over a distance of 1 m in 2 s. Its frequency is
0.5 Hz
The frequency of the second hand on a clock is
1/60 Hz
A tuning fork of frequency 200 Hz will resonate if a sound wave incident on it has a frequency of
100 Hz
The range of human hearing is from about
20 Hz - 20,000 Hz
A general rule for estimating the distance in kilometers between an observer and a lightning bolt is to count the number of seconds between seeing the lightning and hearing it, and dividing by
3
A wave oscillates up and down two complete cycles each second. If the wave travels an average distance of 6 m in 1 s, its wavelength is
3 m
Two tuning forks produce sounds of wavelengths 3.4 m and 3.3 m. Approximately what beat frequency is produced?
3.0 Hz
A boat at anchor is rocked by waves whose crests are 40 m apart and whose speed is 10 m/s. These waves reach the boat once every
4.0 s
A standing wave occurs when
A wave reflects upon itself
The Doppler effect is characteristic of - Light waves - Sound waves - All of these - None of these - Water waves
All of these
The loudness of a musical sound is a measure of the sound wave's
Amplitude
For light, a red shift indicates the light source moves
Away from you
A dolphin perceives its environment by the sense of - Sight - Sound - Both - Neither
Both
Refraction of sound can occur in - Neither - Air - Water - Both
Both
The natural frequency of an object depends on its - Size and shape - Elasticity - Both of these - Neither of these
Both of these
The pendulum with the greatest frequency is the pendulum with the - Neither of these - Shortest period - Both of these - Shortest length
Both of these
As we become older, the frequency range of human hearing
Decreases
The pitch of a musical sound depends on the sound wave's
Frequency
A neon atom is heavier than a helium atom. At the same temperature and pressure, how does the speed of sound in helium gas compare to the speed of sound in neon gas?
Greater in helium than in neon
If you double the frequency of a vibrating object, its period
Halves
The quality of a musical note has to do with its
Harmonics
In which one of these does sound travel the fastest?
Ice
If at a concert, a wind blows directly from the orchestra toward you, the speed of the sound you hear will be
Increased
If at a concert, a wind blows directly from the orchestra toward you, the wavelength of the sound you hear will be
Increased
Xenon is a heavier atom than Krypton. Given that both gases are at the same temperature, in which medium does sound travel fastest?
Krypton gas
If a guitar has no sounding board, a note played on the guitar will sound for a
Longer time
A sound wave is
Longitudinal wave
Compressions and rarefactions are characteristic of
Longitudinal waves
We are best at hearing - Both of these - Neither of these - Infrasonic sound - Ultrasonic sound
Neither of these
Double the frequency of sound and you also double its - None of these - Speed - Amplitude - Wavelength - All of these
None of these
A wave travels an average distance of 1 m in 1 s with a frequency of 1 Hz. Its amplitude is
Not enough information to say
A sound source of high frequency emits a high
Pitch
Some singers are said to be able to shatter a crystal chandelier shatter with their voice. This is a demonstration of
Resonance
Reverberation is a phenomenon you would be most likely to hear if you sing in the
Shower
A bass fiddle is louder than a harp because of its
Sounding board
The explanation for refraction must involve a change in
Speed
The speed of a sound wave in air depends on
The air temperature
Compressions and rarefactions normally travel in
The same direction in a wave
When the speed of sound near the ground is greater than higher in the air, sound tends to be bent
Upward
Sound travels faster in air if the air is
Warm