Question

Why can we not hear the echo if we are
standing 10 m away from a wall?​

Answer 1

Answer:

hey mate...

Explanation:

This shows that loudness of the sound produced by a vibrating object depends on the amplitude of vibration. ... This is because, distance travelled by sound in 1/10 second = speed x time = 340 m/s x (1/10) s = 34 m. Thus, we cannot hear the echo if you stand 10 m away from a wall and shout towards it.