A bell is ringing inside of a sealed glass jar that is connected to a vacuum pump. Initially, the jar is filled with air. What does one hear as the air is slowly removed from the jar by the pump?
A)The sound intensity from the bell gradually decreases.
B)The frequency of the sound from the bell gradually increases.
C)The frequency of the sound from the bell gradually decreases.
D)The speed of the sound from the bell gradually increases.
E)The intensity of the sound from the bell does not change.

Question

Quizplus · Accepted Answer

As the air is removed from the jar, the medium for sound transmission is reduced, causing the sound intensity to decrease.

A Bell Is Ringing Inside of a Sealed Glass Jar