The amplitude on a longitudinal wave is a measure of? A. the speed of the wave. B. how high off the resting position the wave is. C. how compressed or rarefied the medium becomes.

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. Amplitude is a measure of the amount of energy in a wave. In a transverse wave, amplitude is the measure from the resting position to either the crest (high point of the wave) or to the trough (low point of the wave.)

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