Question

The speed of sound on steel is about 5000 m/s. A friend of yours, 2000 m away, strikes a railroad track which you have your ear on. How long after she strikes it will the sound arrive?

Answer 1

t = 0.4 s

Step-by-step explanation:

Given that,

The speed of sound on steel is about 5000 m/s.

A friend of yours, 2000 m away, strikes a railroad track which you have your ear on.

We need to find the time after she strikes it will the sound arrive. Let the time is t. We know that,

Speed = distance/time

So,

`t=(d)/(v)\\\\t=(2000)/(5000)\\\\t=0.4\ s`

So, the required time is 0.4 seconds.