Question

A baseball fan sitting in the "cheap seats" is
d = 156 m
from home plate (see the figure below).

How much time elapses between the instant the fan sees a batter hit the ball and the moment the fan hears the sound? (Assume the speed of sound is 344 m/s, and the vertical distance can be ignored.)

Answer 1

We are given the speed of sound c and the distance d between the batter and the fan. Then the time that sound travels from the batter to the fan is determined by

$$t=\frac{d}{c}$$

Substituting the given values d = 156 m and c=344 m/s, we get the time elapses between the instant the fan sees the batter hit the ball and the moment the fan hears the sound

$$t=\frac{156\text{ }m}{344\text{ }m/s}=\text{0}\text{,45s}$$