Question

vibration???????¿?????????????¿????​

Answer 1

the up and down or to and fro movement of a offer object is called as vibration

Answer 2

Answer:

the oscillating, reciprocating, or other periodic motion of a rigid or elastic body or medium forced from a position or state of equilibrium.

the analogous motion of the particles of a mass of air or the like, whose state of equilibrium has been disturbed, as in transmitting sound.