Question

A sound wave traveling at STP has a period of .0023 seconds. The wavelength of this sound is closest to

1)1.4E5
2)6.9E-6
3)0.76m
4)76m

Answer 1

Answer: 3

Wavelength = 0.76m

Step-by-step explanation:

When sound wave is travelling at standard temperature and pressure ( STP), its speed will be equal to normal speed of sound which is equal to 331 m/s

Given that the period of the wave is 0.0023 seconds.

Wave speed = wavelength/period

Substitute the wave speed and the period to obtain wavelength

331 = wavelength/0.0023

Cross multiply

Wavelength = 331 × 0.0023

Wavelength = 0.7613 metre

The wavelength of this sound is closest to 0.76 m