Question

A sound wave travelat aspeed of 339m/s. If its wavelengh is3.5cm,what is the frequency of the wave ?will it be audible?

Answer 1

Hi baby

Speed  ⇒ 339 m/s

Wavelength ⇒ 1.5 cm 

now change it to metre

            ⇒ 1.5 / 100

            ⇒ 0.015 m 

    Speed = Wavelength x Frequency

⇒ 339 m/s  = 0.015m x Frequency

⇒ Frequency = 339 m/s / 0.015m

                      

                      = 22600 Hz.

It is more than 20000 Hz. Therefore, it will not be audible to the human ear.