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The source of all wave motion is __
movement of matter
a harmonic object
a vibration
region of variable high & low pressure
Any type of wave may be distorted.
true
false
A reflected sound wave is called _
a bounced wave
an echo
a reverberation
a natural frequency wave
A speaker makes sound by vibrating back & forth creating compressions & rarefactions
true
false
The field of study that analyzes the behavior of waves is called _
sound dynamics
sound engineering
acoustics
wave dynamics
When a sound source moves towards you, what happens to the wavelength?
it increase
it decreases
it remains the same
Sound is an example of a ___wave.
a longitudinal wave
a transverse wave
a standing wave
a doppler wave
As a speaker increases the velocity of vibrations, the pitch of the sound produced _
increases
decreases
remains the same
The angle of incident wave equals the angle of __ wave.
reflected
refracted
diffracted
absorbed
Antinoise technology use constructive interference to decrease the loudness of devices
true
false
Waves created by an earthquake are called _
transverse waves
shake waves
seismic waves
sound waves
Two waves arrive at the same place at the same time exactly in phase with each other.
4m
2m
1m
0.5m
Frequency which needs minimum energy to continue vibrating at that frequency is_ frequency
forced
resonant
natural
automatic
A longitudinal wave can also be called a compression wave.
true
false
An object is made to vibrate by another vibrating object that is nearby. This is called a
resonant vibration
forced vibration
natural vibration
automatic vibration
Interference is a property of only some types of waves
true
false
A __ wave resembles a transverse wave but occurs in mediums that are fixed at both ends
reflected
diffracted
standing
refracted
Waves carry energy from place to place.
true
false
The number of vibrations or waves per unit of time is called
frequency
period
wavelength
velocity
The time needed for one back & forth motion or one wave is called _
vibration
wave
period
frequency
Waves produced by throwing a rock in a pond are called __ waves.
longitudinal
compression
transverse
electromagnetic
When resonance occurs, what occurs?
velocity of sound wave increases
frequency of sound wave increases
wavelength of sound wave increases
amplitude of sound wave increases
A wave whose frequency changes due to the motion of the source is a __wave.
a longitudinal wave
a transverse wave
a standing wave
a doppler wave
Sound travels faster in air if the air is ___
warm
cold
neither: the velocity is the same
Type of wave used by police to determine the velocity of a vehicle is a _ wave
reflected
refracted
doppler
standing
Loudness of sound corresponds to the ___ of the sound wave.
frequency
wavelength
amplitude
velocity
The phenomenon of beats results from sound _
refraction
reflection
interference
absorption
When a sound source moves towards you, what happens to the frequency?
it increases
it decreases
it remains the same
Which wave behavior results in a change in frequency?
reflected wave
refracted wave
doppler wave
absorbed wave
Sound waves that are above 20,000 Hz, to high for humans to hear, are called _
subsonic
supersonic
ultrasonic
infrasonic
Waves that encounter a medium whose electron's natural frequency match frequency of wave _
reflected
refracted
diffracted
absorbed
The intensity of a sound wave can be measured but the loudness of it can not.
true
false
A disturbance in air in which the pressure is lowered is called a __
compression
rarefaction
crest
trough
All of a wave’s energy is reflected as it strikes an object.
true
false
Destructive interference of radio waves results in static.
true
false
Red light has a longer wavelength than violet light. Which has the greatest frequency?
red light
violet light
neither: they have the same frequency
An object moving through a medium faster than the speed of waves in the medium, a 3D __
shock wave is produced
bow wave is produced
standing wave is produced
reflected wave is produced
The intensity of sound is measured in decibels.
true
false
Electromagnetic waves are __
transverse waves
longitudinal waves
both types of waves
neither type of wave
Which of the following would be most likely to transmit sound the fastest?
water in a pool
wood in a desk
air in a classroom
steel in a bridge
As the sound of a car’s horn passes & recedes from you, the pitch seems to
increase
decrease
stays the same
doubles
A sounding board encounters forced vibrations which amplify the sound it produces
true
false
Interference effects the loudness of sounds.
true
false
Multiple reflections of a sound wave is called ___
a bounced wave
an echo
a reverberation
a natural frequency wave
The frequency of a vibrating source will always equal the frequency of sound waves created
true
false
Waves that meet a boundary between 2 mediums thus changing the waves velocity are
reflected
refracted
diffracted
absorbed
A disturbance that repeats regularly in space and time is called _
wave
vibration
sound
transverse wave
When a wave source moves toward a receiver, the receiver encoutners _
an increase in wave frequency
an increase in wave velocity
an increase in both wave frequency & velocity
neither an increase in wave frequency or velocity
A moving source must emit a sound in order for it to make a shock wave.
true
false
When you adjust the tuner on a radio set, you are adjusting the natural frequency of
true
false
Increased amplitude of a light wave results in __
a shift towards blue light
a shift towards red light
a brighter light
an absorbed light wave
A sonic boom is __
roduced as a plane breaks through the sound barrier
produced by subsonic bullets as well as subsonic aircraft
swept behind a plane flying faster than speed of sound
all of the choices
Sound waves travel faster in the air than in water
true
false
A pulse of high pressure air is called a ___.
compression
rarefaction
crest
trough
The distance between successive identical parts of a wave is called __
crest
amplitude
wavelength
midpoint
A wave with a vibration that is at right angles to the direction the wave is traveling is
a longitudinal wave
a transverse wave
a standing wave
a doppler wave
Waves that change direction when they bounce off of a barrier are
reflected
refracted
diffracted
absorbed
A repeating back and forth motion about an equilibrium position is called __
vibration
wave
period
frequency
Waves that encounter an obstacle in its path & spead out around the object are
reflected
refracted
diffracted
absorbed
Sound waves can not travel in ___.
air
water
steel
a vacuum
Waves that occur in the same region at the same time undergo _
absorption
distortion
interference
reflection
The thicker an instrument’s string, the higher the pitch.
true
false
a seismic wave is an example of __
a longitudinal wave
a transverse wave
a standing wave
a doppler wave
A wave that is a result of interference between an incident (original) & reflected wave is