An object in a room vibrates. However, a person in that same room does not hear anything. Why not?
A The room contains no air.
B
The sound waves are travelling too fast.
С
The amplitude of the sound waves is too great.
D
The frequency of the sound waves is too great.
​

D

Explanation:

the rest is impossible

it cannot be that the room contains no air

even if sound "travels" fast, we can hear it

so it cannot be

the amplitude is great means it is loud, so this is wrong

humans cannot hear something because it is not within the range of the human range of audibility.

which is form 20 Hz to 20000 Hz .

so the answer is D

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