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