A person on a pier observes a set of incoming waves that have a sinusoidal form with a distance of 1.6 m between the crests. If the wave lapse against the pier every 4s, what are:
(b) the speed of the waves?

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Solution

Step 1- Given data
$T = 4 s e c o n d s$ ,
wavelength $λ = 1.6 m .$
where T is the time period, f is the frequency and λ is the wavelength.
Step 2- Finding the speed of the wave-
The formula for the speed of the wave is-
$v = f λ$
$v = f λ = 0.9 \times 10 = 9 m / s .$
Thus, the speed of the wave is $9 m / s .$

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A person on a pier observes a set of incoming waves that have a sinusoidal form with a distance of 1.6 m between the crests. If the wave lapse against the pier every 4s, what are:(b) the speed of the waves?

Step 1- Given dataT=4seconds, wavelength λ=1.6m. where T is the time period, f is the frequency and λ is the wavelength.Step 2- Finding the speed of the wave-The formula for the speed of the wave is-v=fλv=fλ=0.9×10=9m/s.Thus, the speed of the wave is 9m/s.

A person on a pier observes a set of incoming waves that have a sinusoidal form with a distance of 1.6 m between the crests. If the wave lapse against the pier every 4s, what are:
(b) the speed of the waves?