A sound wave from a speaker causes a vibration in a hollow plastic box across th

Question

A sound wave from a speaker causes a vibration in a hollow plastic box across the room. When the volume of the sound is increased, the vibration of the box also increases. Which of the following explains why? (A) The sound wave now moves across the room faster and therefore transfers energy to the box at a higher rate. (B) The sound wave now moves across the room faster and therefore shakes the box at a greater frequency. (C) The sound wave now has a greater change in pressure and therefore transfers energy to the box at a higher rate. (D) The sound wave now has a greater change in pressure and therefore shakes the box at a greater frequency.

Explanation / Answer

Increasing the volume increases the amplitude of wave , which means now there will be greater change in pressure and this change in pressure will transfer energy to box at higher rate.

As increasing amplitude does not mean increase in frequency so frequency of vibration will not be affected on changing volume.

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