On a cold day, the speed of sound in air is 330 m/s. A note with a frequency of 1,320 Hz is played on an instrument. What is the wavelength of that sound wave? 0.25 m 4 m 1,650 m 435,600 m

Answer: wavelength 0.25m

Solution:

We will be using the wave equation to determine the wavelength

V = f (λ)

Speed = frequency. Wavelength

Using this in the equation:

Speed = 330 m/s

Frequency = 1320 Hz

V = f (λ)

330 = (1320) (λ)

0.25m = λ

Note: Do not forget to mention the units (i. e. meters/m) or otherwise it may cost you marks! For frequency the unit is Hz and for speed (v) the unit is m/s (Meter/second)

Answer: wavelength 0.25m