The sound emitted by bats has a wavelength of 3.2 mm. What is the sound's frequency in air?

Question

The sound emitted by bats has a wavelength of 3.2 mm. What is the sound's frequency in air?

___Hz

Answer 1

the relation among quantities that are given in the question, that is, velocity, wavelength and frequency is as follow

velocity = frequency * wavelength

now

wavelength = 3.2 mm = 0.0032 m

velocity = 340 m/s (in air for sound waves)

frequency = velocity/ wavelength

              = 340/0.0032 = 106250 Hz

Answer 2

wavelength = speed divided by frequency

The speed of sound is about 343 m/s.  Convert to proper units, and solve for frequency.