The hunter heard the echo of the shot he fired after 4.5 seconds. How far is the surface that reflects the sound?
| May 2, 2021 | education
t = 4.5 seconds – the time interval after which the hunter heard the echo from the shot;
u = 330 meters per second – the speed of sound propagation in air.
It is required to determine L (meter) – at what distance the obstacle is.
During the time interval t, the sound from the shot reached the obstacle, and then, reflected from it, returned to the hunter. Then, to determine the distance, you must use the following formula:
t = 2 * L / u, from here we find that:
L = u * t / 2 = 330 * 4.5 / 2 = 1485/2 = 742.5 meters.
Answer: the distance from the hunter to the obstacle is 742.5 meters.
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