Question

Astronauts on moon cannot hear each other directly.

Answer 1

Answer:

Sound requires medium to travel. The absence of atmosphere on the Moon makes it medium less. Thus, the astronauts on the Moon cannot hear each other directly because of absence of the medium.

Answer 2

Answer:

There is no atmosphere on moon

Explanation:

since sound needs a medium to propagate and there is no medium (atmosphere) on moon,astronaut on moon cannot hear each other directly