Question

1. A sound engineer has set up his mixing equipment a distance from an outdoor band shell.She claps her hands and hears the echo 0.250 s later. If the speed of sound was 340.0m/s, how far from the wall was she?

Answer 1

Given

Hears the echo at , t=0.250 s

Speed pf sound is v=340 m/s

To find

The distance from the wall

Step-by-step explanation

let her distance from the wall be d.

When she hears the echo, the sound has travelled the same distance twice

So

`\begin{gathered} v=(2d)/(t) \\ \Rightarrow340=(2d)/(0.250) \\ \Rightarrow d=d=42.5\text{ m} \end{gathered}`

Conclusion

The distance of the wall from her is 42.5 m