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Introduction to Waves: Quiz Review

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  • Do "wavy arms" for 15 seconds and get these points!
    Did you do it?
  • 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
  • What unit is used to describe frequency?
    Hertz (Hz)
  • 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
  • Which letter represents wavelength?
    A
  • How could I measure the amplitude of a wave?
    From rest position to the trough or rest position to the crest
  • Which letters are crests?
    B and F
  • Which letter represents amplitude?
    B
  • 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
  • Wave your arms in the air like you just don't care and get these points.
    Did you do it?
  • Which letters are troughs?
    D and H
  • 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.
  • Do "the wave" as a team and get these points!
    Did you do it?
  • What word describes the number of waves that pass a point during a certain amount of time?
    frequency
  • Which letters are at rest position?
    A, C, E, and G
  • How many wavelengths are shown in the picture?
    2
  • 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)
  • TRUE or FALSE: If everything else is the same, a wave with a smaller amplitude has more energy.
    False
  • All waves must travel through a ________.
    medium
  • 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
  • In a wave, an area where coils are spread out is called a...
    rarefaction
  • In a wave, an area where coils are pressed together are called a...
    compression
  • 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!)