Question

A coach shouts "Go!" from the finish line of a 100.0-m track to the runners.

It takes 292 ms for the 171-Hz sound wave to reach them. Calculate the speed of
sound in air and the wavelength of her voice.

Answer 1

a. Speed = 342.5 meters per seconds.

b. Wavelength = 2.0 meters

Step-by-step explanation:

Given the following data;

Distance = 100m

Time = 292 milliseconds to seconds = 292/1000 = 0.292 seconds

Frequency = 171 Hz

a. To find the speed of sound in air;

Speed = distance/time

Speed = 100/0.292

Speed = 342.5 m/s

b. To find the wavelength;

Wavelength = speed/frequency

Wavelength = 342.5/171

Wavelength = 2.0 m