Physics 1138 test
Supersonic
Speed greater than the speed of sound
Subsonic
Speed less than the speed of sound
Sound travels fastest in
Steel
How does sonar measure distances to underwater obstacles?
By detecting how much it takes for a reflected wave to return
What would not describe a musical tone?
Compression
What property of waves is affected by reflection?
Direction
Name three things that typify music:
Rhythm, melody, harmony
Give at least two ways seismic waves are helpful to us
Seismic waves help us understand the internal structure of earth and aid us in finding oil
Stringed instruments
Make music by bowing, plucking, or striking strings
Refraction
Change in the direction as a wave passes into a new medium
Sonic boom
Loud compression wave generated by an object traveling at the speed of sound or faster
Fourier analysis
Separating a complex wave motion into a series of simple sine waves
Noise
Sound made of so many different frequencies that no discernible pattern can be recognized
Music
Sounds with a discernible pattern that repeats
When a wave enters a new medium, what will always change?
Speed
The loudness of a sound depends primarily upon its
Amplitude
Reflection
An abrupt change in the direction of a wave
Sonar
An instrument that measures distances to underwater obstacles
Standing wave
Waves produced by two wave trains of the same frequency traveling in opposite directions
Sound barrier
The speed of sound
Wind instruments
Make music by a vibrating air column in a pipe
What is the Doppler effect?
A phenomenon in which waves from a moving source seem to change in frequency as the source approaches or recedes from the observer
What is sound intensity?
The quantity of energy passing through one square centimeter of area each second
Acoustics
The study of sound and its control in enclosed areas
Affects speed of a wave
Medium
Seismic wave
A wave caused by an earthquake
The fundamental frequency of an object does not depend of
Overtones
Antinodes
Points at the center of the loops of a standing wave where the amplitude is the greatest
Define resonance
The inducing of motions that occurs when the vibrations produced by one object acts upon a second object and causes it to vibrate as well
