Question

A wave has a wavelength of 7 mm and a frequency of 13 hertz. What is its speed?

Answer 1

0.091 m/s

Step-by-step explanation:

Given in the question that,

wavelength of a wave = 7mm

frequency of a wave = 13 hertz

Formula to use

f = v / λ

here f = frequency in hertz

v = velocity in m/s

λ = wavelength in m

1 mm = 1x10
`^(-3)`

7mm = 7x10
`^(-3)`

Plug values in the formula

13 = v / 7x10
`^(-3)`

v = 13(7x10^{-3})

v = 0.091 m/s