Question

What is the frequency of a wave that has a wavelength of 0.78 m and a speed

of 343 m/s?

O A. 267 Hz

B. 0.004 Hz

C. 440 Hz

D. 0.002 Hz

Answer 1

440 Hz

Step-by-step explanation:

just is

Answer 2

C. f = 440 Hz

Step-by-step explanation:

• In any wave, there is a fixed relationship between the wavelength (distance between two sucesive crests), the frequency (number of cycles per unit time) and the perturbation speed, as follows:

`v = \lambda * f (1)`

where v = speed of the wave

λ = wavelength

f = frequency

• Replacing by the givens in (1) and solving for f, we have:

`f = (343 m/s)/(0.78m) = 440 Hz`

• f = 440 Hz