3. If the energy in a longitudinal wave travels from south to north, the particles of the medium would be vibrating. A. from north to south only B. Both north and south. C. from east to west only. D. both east and west ​

In longitudinal waves, particles of the medium vibrate to and from in a direction parallel to the direction of energy transport. If the particles only moved north and not back south, then the particles would be permanently displaced from their rest position; this is not wavelike.

Explanation:

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b.

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