Question

if you are walking on the moon surface, can you hear the cracking sound behind you? Explain.​

Answer 1

Answer:

No, we can't hear the cracking sound behind us, if we are walking on the moon surface. This is so because there is no atmosphere on the moon. So there is lack of medium for the propagation of sound waves on the moon. As we know that sound waves need medium for propagation, it can not propagate in vacuum.

Answer 2

Answer:

☆Concept:

》how do we hear sound?

- whenever if speak anything, our hot air of mouth gives the energy to the surrounding air particles,which in turn get transferred by vibrations and reach our ear,and we hear the sound wave

- but this whole process is done in such nano seconds that its our beyond ability to predict it.

☆so from above all,we know that sound is hear due to the working of surrounding air particles.

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• returning to your ques;

1. yes, we'll hear the sound of crackers or anything in moon as some gaseous particles are present there such as sodium,potassium..
2. but it may differ by which spead we hear it,it may be lesser than we hear on earth!
3. and may change some voice frequency depending on particles present.

$\bf{♧hope\;it\;helps\;!♧}$