What does the term equilibrium refer to?

a) the resting position of the wave
b) the highest point on the wave
c) the lowest point of the wave
d) the next subsequent wave
e) the period of the wave

Answer;

A) the resting position of the wave

Explanation;A wave is a transmission of a disturbance from one point which is the source to another, and this involves transfer of energy through a material medium.Equilibrium refers to a state of balance between opposing forces, it is a state of balance in which opposing forces cancel one another. When wave is in rest position its called equilibrium position of a wave. When a wave travels through a material medium, the particles in the medium are disturbed from their resting, or equilibrium positions.