The video below will derive the expression for the change in pressure due to a passing sound wave:
.
Watch it before answering the question.

If you blow across the top of an empty soft-drink bottle, a pulse of sound travels down through the air in the bottle. At the moment the pulse reaches the bottom of the bottle, what is the correct description of the displacement of the elements of air
from their equilibrium positions and the pressure of air at this point?

Question

The video below will derive the expression for the change in pressure due to a passing sound wave: 
  . 
 Watch it before answering the question.

If you blow across the top of an empty soft-drink bottle, a pulse of sound travels down through the air in the bottle. At the moment the pulse reaches the bottom of the bottle, what is the correct description of the displacement of the elements of air
    from their equilibrium positions and the pressure of air at this point?

Accepted Answer

(c)The displacement is zero, and the pressure is maximum

Answer

(d)The displacement is zero and the pressure is minimum

Answer

(a) The displacement and pressure are both maximum

Answer

(b) The pressure and displacement are both minimum

Crowdly

The video below will derive the expression for the change in pressure due to a p...

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