Answer to Question #158775 in Physics for mary

Question

Echoes are produced when a sound wave reflects off a surface and then returns to the source of the sound.

On the last day of semester 1, Ms L is outside and shouts “I’ll miss my physics students!” If the building off of which her sound wave reflected is 375 m away, how long will it take for Ms L to hear her echo? The speed of sound is 340 m/s. 

Answer 1

$t=(375+375)/340\approx2.2(s)$ .Answer