Question

What should be the distance from the cliff if a person needs to hear the echo

of his voice after 5 s, provided speed of the sound is 345 ms-1

.

What would be the velocity of a wave with frequency of 20 Hz and wavelength

of 20 m? Mention if the frequency of the sound will be audible here?​

Answer 1

Answer:

1st answer is 67m

and second answer is 400ms-¹ and so its audible

Explanation:

hope it will help you