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A wave whose disturbance is parallel to its direction of travel is:
ALongitudinal
BLongstanding
CLongitudinary
DLongwearing
Answer & Solution
Correct answer: A. Longitudinal
1. Here the particles move back and forth along the path.
2. Sound in air behaves this way.
3. Such a wave is longitudinal.
_Source: OpenStax College Physics 2e, Chapter 16, Oscillatory Motion and Waves._
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