Physics 1138 test

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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


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