A sound pulsar unit puts out short sound bursts at constant time intervals. This unit also has a receiver to listen to the time delay from an echo from any objects or walls. If the unit is positioned such that the echo time corresponds to the sound burst interval of 0.6 s, find the distance to the reflecting wall. Velocity of sound in air = 331 m/s.)
A) 150 m
B) 50.0 m
C) 200 m
D) 100 m
E) None of the above.

Question

Quizplus · Accepted Answer

The total time for the sound to travel to the wall and back is 0.6 s. Therefore, the time to reach the wall is 0.3 s. Using the formula distance = speed × time, the distance to the wall is 331 m/s × 0.3 s = 99.3 m, which rounds to 100 m.

A Sound Pulsar Unit Puts Out Short Sound Bursts at Constant