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WorksheetsSound Waves Test
Total questions: 33
Worksheet time: 30mins
(a) is defined as the transfer of energy from a vibrating object in waves that travel through matter.
a vacuum (empty space).
The speed of sound also depends on the (a) of the medium.
As a sound wave spreads out, its intensity...
Decreases
Increases
Stays the same
How much louder is a 60dB sound than a 30dB sound?
10x louder
100x louder
1000x louder
10,000x louder
The human ear can hear a minimum of ____Hz.
20 Hz
10 Hz
30 Hz
50 Hz
The human ear can hear up to ___________Hz
25.000 Hz
20.000 Hz
85.000 Hz
50.000 Hz
What is amplitude?
the number of vibrations per second
how high or low a sound is
the distance between the rest position and the peak of a wave
the back and forth movement of matter
Although it depends on how long and how often a person is exposed, and how close they are to the sound, people are generally advised against exposure to any sound above _________ decibels?
50
85
120
155
Earbuds at about ______ of its max volume is about 85 decibels.
50%
70%
85%
100%
Because earbuds sit inside of your ears, closer to the ear canal, the sound is more amplified, which means you can be doing more damage than you realize.
True
False
A low frequency has a ........... pitch.
low
high
Which of the following sound wave produces the highest pitch of sound?
Which of the following determines the pitch of a sound wave?
Frequency
Amplitude
Reflection
Absorption
What is the Doppler Effect?
A change in frequency due to the relative motion of a wave source and an observer
When a wave overlaps with another wave
When a wave bounces off of another object
When a wave bends due to traveling through a different medium
Look at the picture. Who is experiencing a higher pitched sound?
Observer A
Observer B
There's no difference
What is the frequency heard by a person driving at 30.0 m/s toward a blowing factory whistle if the emitted frequency is 801 Hz and the speed of sound is 343. m/s?
(a)
What is the frequency heard by a person driving at 45.0 m/s away from a blowing factory whistle if the emitted frequency is 801 Hz and the speed of sound is 343. m/s?
(a)
Which type of vibrations have the HIGHEST amount of energy?
infrasound
ultrasound
They all have the same
amount of energy.
(a) stands for sound navigation and ranging.
A sonar device on the ship sends an ultrasound wave to the bottom. If the sound wave is reflected back to the device in exactly 5.000 seconds, how deep is the water? v = 1437 m/s
d=vt
(a)
Sound waves vibrate a medium...
up and down
back and forth
In the sound wave, what is A?
compression
crest
trough
rarefaction
You hear the thunder 5s after you see the lightning. Approximately how far away was the lightning strike in miles?
(a)
