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the waveform traced by simple harmonic motion, which can be made visible on a moving conveyor belt by a pendulum swinging at right angles above the moving belt
for a wave or vibration, the maximum displacement on either side of the equilibrium (midpoint) position
for a vibrating body of medium, the number of vibrations per unit time; for a wave, the number of crests that pass a particular point per unit time
a wave in which the medium vibrated in a direction perpendicular to the direction in which the wave travels
a wave in which the medium vibrates in a direction parallel to the direction in which the wave travels
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