Question

One brand of dog whistles claims a frequency of 25 kHz for its product. What is the wavelength of this sound? (the speed of sound in air is 343 m/s)
0.01372 m
0.02181 m
0.01748 m
0.011654 m

Answer 1

Answer:

Option A

0.01372 m

Explanation:

The speed of sound is a product of the wavelength and frequency hence

Speed=Wavelength * Frequency

Making wavelength the subject then

$Wavelength=\frac {speed}{frequency}$

Substituting 343 m/s for speed and 25 kHz= 25000 Hz for frequency we obtain

$Wavelength=\frac {343}{25000}=0.01372 m$