Question

A mobile phone is ringing inside a glass jar.
The air from the glass jar is sucked out
completely. Therefore, when heard from
outside the jar.
(1) the ringing sound will have high pitch.
(2) the ringing sound will have low pitch.
(3) the ringing sound will not be heard.
(4) the ringing sound will have high
amplitude.​

Answer 1

Answer:

The ringing sound will not be heard.

Explanation:

Because the air of the jar is sucked out and the phone is ringing inside the jar.

Answer 2

The correct answer is OPTION 2: the ringing sound will have a low pitch.

• The bell jar experiment was used to test the medium's properties.
• It emphasizes the importance of a medium for sound to travel through.
• Sound is a disturbance in the air induced by the presence of a medium.
• Sound is a wave with a disturbance of wave particles that is also a type of energy.
• To travel, sound requires a medium.

• As a result of the vacuum pump blasting out the air, the medium through which sound travels is likewise pumped out.
• The noises become less audible as a result.