Question

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

Answer 1

Answer:

C. f = 440 Hz

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:

       $f = \frac{343 m/s}{0.78m} = 440 Hz$

• f = 440 Hz

Answer 2

Answer:

440 Hz

Explanation:

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