Shelli is a student describing the resonance of a metal beam. She demonstrates that the sound dims when the beam is vibrated at a certain frequency. What does she most likely say in response to the dimming

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asked Jan 4, 2021 179k views

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Shelli is a student describing the resonance of a metal beam. She demonstrates that the sound dims when the beam is vibrated at a certain frequency.

What does she most likely say in response to the dimming sound?

“This is not the natural frequency of the beam.”
“This is the natural frequency of the beam.”
“The decibels are increasing.”
“The amplitude is not increasing.”