Question

A baseball fan sitting in the cheap seats is 136 m away from homeplate. How much time elapses between the instant that the fan sees a batter hit the ball and the moment the fan hears the crack of the bat?

Answer 1

Answer on Question #47918, Physics, Mechanics | Kinematics | Dynamics

Question:

A baseball fan sitting in the cheap seats is 136 m away from homeplate. How much time elapses between the instant that the fan sees a batter hit the ball and the moment the fan hears the crack of the bat?

Answer:

Speed of sound in air equals $c = 340 \, \text{m/s}$. Therefore time elapses between the instant that the fan sees a batter hit the ball and the moment the fan hears the crack of the bat:

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

where $d$ is distance to the homeplate.

$$t = \frac{136 \, \text{m}}{340 \, \frac{\text{m}}{\text{s}}} = 0.4 \, \text{s}$$

Answer: 0.4 s

http://www.AssignmentExpert.com/