Wave Properties│Please Help!

Question

A wave along a guitar string has a frequency of 540 Hz and a wavelength of 2.5 meters. Calculate the speed of the wave.

Answer 1

frequency:

Note that f = 540 Hz means the same as 540 s⁻¹ (per second)

wavelength:

λ = 2.5 m

speed:

v has units m/s

So, based on units, it makes sense that v = λf and this is actually the case.

v = λf = (2.5 m)(540 Hz) = 1,350 m/s