12298349
Descripción
Test por JanaLee Moses, actualizado hace más de 1 año
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Creado por JanaLee Moses
hace más de 6 años
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Pregunta 1
Pregunta
A region of high molecular density and high air pressure is called a _____________________.
Respuesta
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compression
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rarefaction
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vibration
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wave
Pregunta 2
Pregunta
Sound waves are ________________.
Respuesta
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longitudinal
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transverse
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sine waves
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electromagnetic waves
Pregunta 3
Pregunta
Frequency is defined as what?
Respuesta
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The number of cycles per unit of time
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The amount of time per cycle.
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The same as velocity.
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The distance between cycles of a wave.
Pregunta 4
Pregunta
With sound, frequency determines _______________.
Respuesta
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pitch
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color
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loudness
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intensity
Pregunta 5
Pregunta
Sound waves can travel through which of the following? (Select ALL that apply)
Respuesta
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Solids
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Liquids
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Gases
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Empty space
Pregunta 6
Pregunta
The speed of down depends on both the ___________ and ____________ of the medium.
Respuesta
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type, temperature
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type, harmonics
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temperature, harmonics
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harmonics, velocity
Pregunta 7
Pregunta
Sound waves can be approximated as __________.
Respuesta
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spherical
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conical
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sine waves
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cubic
Pregunta 8
Pregunta
As the source of a sound approaches you, the pitch of the sound seems to ___________.
Respuesta
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be higher
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be lower
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remain the same
Pregunta 9
Pregunta
Because of the Doppler Effect, when a sound source is moving away from you, the frequency seems to ____________ although it actually ____________.
Respuesta
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lessen, remains the same
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become greater, remains the same
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remain the same, lessens
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remain the same, becomes greater
Pregunta 10
Pregunta
As a soundboard vibrates back and forth, its _________ is converted into sound waves.
Respuesta
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kinetic energy
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potential energy
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harmonics
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intensity
Pregunta 11
Pregunta
Intensity is the rate of _________ through a given area.
Respuesta
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energy flow
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harmonics
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speed
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frequency
Pregunta 12
Pregunta
__________ and __________ determine which sounds are audible.
Respuesta
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Intensity, frequency
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Intensity, decibels
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Frequency, velocity
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Velocity, decibles
Pregunta 13
Pregunta
The unit for the decibel is __________.
Respuesta
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(none)
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dB
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db
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W/m^2
Pregunta 14
Pregunta
Sympathetic vibrations occur when _______.
Respuesta
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vibrations are transferred from one object to another
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an object vibrates at its natural frequency
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a vibration is amplified
Pregunta 15
Pregunta
Vibration at the natural frequency produces _____________.
Respuesta
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resonance
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intensity
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the Doppler Effect
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compressions
Pregunta 16
Pregunta
In 1940, a bridge collapsed due to an issue with ___________.
Respuesta
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resonanace
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intensity
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the Doppler Effect
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impulses
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