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?
a “this is not the natural frequency of the beam.”
b “this is the natural frequency of the beam.”
c “the decibels are increasing.”
d “the amplitude is not increasing.”

The correct answer is “This is not the natural frequency of the beam.”

Explanation:

Resonance is a phenomenon which occurs when the applied frequency on the object is equal to its natural frequency.

When resonance occurs the amplitude of the vibrating object becomes large.

Loudness depends on the amplitude. If the amplitude is low then the sound becomes softer. If the amplitude is large  then the loudness will become more.

In the given problem, 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. She wants to say in response to the dimming sound that this is not the natural frequency of the beam.

As the dimming sound shows that the amplitude of the sound is low. But it cannot happen in the case of resonance.

Therefore, the correct option is A.

answer: the answer is a

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.