Wind blowing across suspended power lines may
cause the power lines to vibrate at their...
Wind blowing across suspended power lines may
cause the power lines to vibrate at their natural
frequency. This often produces audible sound
waves. This phenomenon, often called an
Aeolian harp, is an example of
(1) diffraction (3) refraction
(2) the Doppler effect (4) resonance
Answers: 3
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