Question

echo is not heard in a cubical room of side 10m. speed of sound given is 300m/s. justify​

Answer 1

Explanation:

Explanation: the wall is relatively flat, perpendicular to the source of the sound, and far enough away (but not too far), then you can hear the reflected waveform or echo. If the sound comes back in about 0.1 second or longer, you can readily distinguish the echo. t = the time it takes the sound to go back and forth