Define resonance. ✌ ✌
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Resonance is when the frequencies of forced vibrations on an object matches the object's natural frequency, causing a dramatic increase in amplitude. ... Some examples of resonance include: a vibrating metal rod, this forces the air column inside the rod to vibrate at the same frequencies..
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"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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