The speed of sound varies according to the medium it is travelling in. In beryllium, for example, it can be 300 times faster than in rubber. In beryllium, sound will take just under 2 microseconds to travel an inch.
2
There is no sound in space.
It wouldn't travel at all. Sound can't travel in a vacum. (Translation: Sound can't travel in outer space.)
1000.3848995m/s
about 0.29 second
791 mph.
Since the moon has little to no atmosphere, sound cannot move as it has no medium to travel thru.
3 seconds
Sound waves can't travel through space.
0.1 secondd
0.1 secondd
0.1 secondd