Question

astronauts​ on the moon can not hear each other directly​

Answer 1

Answer:

In moon, the atmosphere is vacuum and sound cannot travel through vacuum

Explanation:

Answer 2

Answer:

Two astronauts on the moon talking to each other directly, will be unable to listen to each other, even if they are very close to each other. The moon does not have an atmosphere. Since there is no medium, which is necessary for the generation and propagation of sound, between the astronauts, direct sound propagation between them is not possible. Therefore, the astronauts use some technology like the one used in our cell-phones to communicate with each other. The waves used in cell-phones do not need any medium for propagation.