Awave has a wavelength of 7 mm and a frequency of 13 hertz. what is its speed?

0.091 m/s

Explanation:

Given in the question that,

wavelength of a wave = 7mm

frequency of a wave = 13 hertz

Formula to use

here f = frequency in hertz

        v = velocity in m/s

        λ = wavelength in m

1 mm = 1x10

7mm = 7x10

Plug values in the formula

 13 = v / 7x10

  v =   13(7x10^{-3})

  v = 0.091 m/s