If you shout, your voice travels at the speed of sound 30m/s to a surface and back, and you hear an echo. If you hear an echo 4.8s after you shout away is the surface from which the sound bounces?
To find the distance of the surface from which the sound bounces, we need to consider the time it takes for the sound to travel to the surface and back.
The echo is heard 4.8 seconds after shouting away. This means that the total round trip time for the sound is 4.8 seconds.
Since the speed of sound is 30 m/s, we can use the equation:
Total Distance = Speed of Sound × Time
Let's solve for the distance:
Total Distance = 30 m/s × 4.8 s
Total Distance = 144 m
Therefore, the surface from which the sound bounces is 144 meters away.