Question

ch- 12
QAns
2-1 what is vibration
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Answer 1

Answer:

VIBRATION...

Explanation:

Vinration means quickly moving back and forth about a point of equilibrium . The vibration may be periodic or random . Something that is vibrating may shake at the same time . The vibration will send sound waves to the ear and to the brain .

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Answer 2

Answer:

Vibration means quickly moving back and forth (or up and down) about a point of equilibrium. The vibration may be periodic (having a pattern) or random. Something that is vibrating may shake at the same time.  This vibration will send sound waves to the ear and to the brain.