Question

Find the minimum distance between the source of sound and the reflecting surface for an echo
to be audible (assuming the listener is closer to the source and the speed of sound = 340 m/s)​

Answer 1

Answer:

ommmmmmmmg

Explanation:

so tafffffffffff

Answer 2

Answer:

Hence, the total distance covered by the sound from the point of generation to the reflecting surface and back should be at least (344 m/s) ×0.1 s = 34.4 m. Thus, for hearing distinct echoes, the minimum distance of the obstacle from the source of sound must be half of this distance. I.e., 34.4/2 = 17 m.