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Introduction to Waves: Quiz Review
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Do "wavy arms" for 15 seconds and get these points!
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wave speed = wavelength x frequency... If the wavelength is 12 m and the frequency is 4 Hz, what is the wave speed?
48 m/s
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What unit is used to describe frequency?
Hertz (Hz)
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wave speed = wavelength x frequency... If the wave speed is 9 m/s and the frequency is 3 Hz, what is the wavelength?
3 m
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Which letter represents wavelength?
A
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How could I measure the amplitude of a wave?
From rest position to the trough or rest position to the crest
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Which letters are crests?
B and F
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Which letter represents amplitude?
B
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If I know that a wave pulse occurs in 5 seconds, what can I use that to calculate: frequency, amplitude, wave speed, or wavelength?
wave speed
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Wave your arms in the air like you just don't care and get these points.
Did you do it?
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Which letters are troughs?
D and H
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What is the difference between a longitudinal and a transverse wave?
Longitudinal waves move parallel to the direction they are traveling, transverse waves move perpendicular to the direction they are traveling.
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Do "the wave" as a team and get these points!
Did you do it?
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What word describes the number of waves that pass a point during a certain amount of time?
frequency
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Which letters are at rest position?
A, C, E, and G
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How many wavelengths are shown in the picture?
2
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How could I measure the wavelength of a wave?
From any point in the wave to the next same point (i.e. crest to crest OR trough to trough)
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TRUE or FALSE: If everything else is the same, a wave with a smaller amplitude has more energy.
False
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All waves must travel through a ________.
medium
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wave speed = wavelength x frequency... If the wave speed is 42 m/s and the wavelength is 6 m, what is the frequency?
7 Hz
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In a wave, an area where coils are spread out is called a...
rarefaction
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In a wave, an area where coils are pressed together are called a...
compression
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If I increase the amplitude by a factor of 3, by how much would the wave energy increase?
A factor of 9 (remember - it's amplitude squared!)
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