Question

6 in what direction is matter displaced in a compressional wave? a in a direction parallel to the energy flow b in the opposite direction as the energy flow c in a spiral around the energy flow d at a right angle to the energy flow

Explanation:

A compressional (longitudinal) wave is defined by the displacement of matter being parallel to the direction of energy flow. Transverse waves have displacement perpendicular (right angle) to energy flow. Options B (opposite) and C (spiral) are incorrect, and D describes transverse waves. So A is correct.

Answer:

A. In a direction parallel to the energy flow