Question

Если выстрелить из пушки в космосе под самым ухом у человека, то он не услышит этого выстрела. Почему?

Answer 1

В космосе нет воздуха, там вакуум.  Звук рождается при ударе звуковой волны о барабанную перепонку, которая вызывает колебания трех слуховых косточек, а они передают в свою очередь колебания в улитку, на слуховые рецепторы, затем по слуховому нерву в височную долю коры больших полушарий головного мозга, где и происходит анализ информации. Звуковая волна формируется в воздушном пространстве, в космосе это невозможно.

Answer 2

Why a Person Wouldn't Hear a Gunshot in Space

In space, if a gunshot were to be fired right next to a person's ear, they would not hear the gunshot. This is because sound requires a medium, such as air, to travel through. In the vacuum of space, there is no medium for the sound waves to travel through, so the sound of the gunshot would not reach the person's ear.

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This phenomenon is due to the fact that sound is a mechanical wave that travels through a medium by causing the particles of the medium to vibrate. In the absence of a medium, such as in the vacuum of space, there are no particles for the sound waves to interact with, and therefore, no sound can be transmitted.

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In summary, the absence of a medium for sound to travel through in the vacuum of space means that a person would not hear a gunshot fired right next to their ear.