EXAM 2 PSC 1121 || WITH 100% ERRORLESS
SOLUTIONS.
Suppose that you hold a vibrating 340 Hz tuning fork near a guitar string that is vibrating at 350
Hz. What you hear is correct answers beats with a frequency of 10 Hz.
In longitudinal waves, the medium correct answers vibrates in the same direction the wave is
moving.
What is the range of normal human hearing? correct answers 20-20,000 Hz
The characteristic of a sound wave that you interpret as loudness is related to correct answers
amplitude.
The time that is required for a vibrating object to complete one full cycle is called correct
answers period
Longitudinal waves with a frequency above 20,000 Hz are correct answers ultrasonic
The frequency is the time required for one complete cycle of a swinging pendulum. correct
answers false
Through which medium will sound travel most rapidly? correct answers steel
A radio playing music at 20 dB intensity is twice as loud as one playing at 10 dB. correct
answers false
Sound waves in air correct answers All of the answers are correct.
Sound travels faster through cold, denser air than through warm, less dense air. correct answers
false
A sound that is perceived as twice as loud requires correct answers ten times the intensity.
Sound waves moving through air are transverse. correct answers false
The distance from peak to peak on a periodic wave is called its correct answers wavelength
Which of the following properties of the wave does not change in the Doppler effect? correct
answers speed
What caused the Tacoma Narrows Bridge to collapse? correct answers The frequency of the
wind's turbulence on the bridge matched the resonant frequency of the bridge.
A weight vibrates up and down on a vertical spring.
SOLUTIONS.
Suppose that you hold a vibrating 340 Hz tuning fork near a guitar string that is vibrating at 350
Hz. What you hear is correct answers beats with a frequency of 10 Hz.
In longitudinal waves, the medium correct answers vibrates in the same direction the wave is
moving.
What is the range of normal human hearing? correct answers 20-20,000 Hz
The characteristic of a sound wave that you interpret as loudness is related to correct answers
amplitude.
The time that is required for a vibrating object to complete one full cycle is called correct
answers period
Longitudinal waves with a frequency above 20,000 Hz are correct answers ultrasonic
The frequency is the time required for one complete cycle of a swinging pendulum. correct
answers false
Through which medium will sound travel most rapidly? correct answers steel
A radio playing music at 20 dB intensity is twice as loud as one playing at 10 dB. correct
answers false
Sound waves in air correct answers All of the answers are correct.
Sound travels faster through cold, denser air than through warm, less dense air. correct answers
false
A sound that is perceived as twice as loud requires correct answers ten times the intensity.
Sound waves moving through air are transverse. correct answers false
The distance from peak to peak on a periodic wave is called its correct answers wavelength
Which of the following properties of the wave does not change in the Doppler effect? correct
answers speed
What caused the Tacoma Narrows Bridge to collapse? correct answers The frequency of the
wind's turbulence on the bridge matched the resonant frequency of the bridge.
A weight vibrates up and down on a vertical spring.
