Question

mustafa this is answer. <br />Definition of Resonance - "The increase in amplitude of oscillation of an electric or mechanical system exposed to a periodic force whose frequency is equal or very close to the natural undamped frequency of the system."
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Answer 1

Answer:

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Answer 2

Answer:

Explanation:

The reinforcement or prolongation of sound by reflection from a surface or by the synchronous vibration of a neighbouring object.