# Question 1c533

Jun 21, 2014

$1.14 m {s}^{-} 1$

The equation needed is v=fλ. The wavelength, λ , was given in the question. It is the distance between adjacent crests (aka peaks) or troughs, i.e. 4.0 m.

To calculate the frequency we need to use this equation: $f = \frac{1}{T}$. The value of T is in the question, 3.5 s.
$f = \frac{1}{T} = 0.29 H z$

Now substitute the values into the first equation:
v=fλ=0.29 * 4.0 = 1.14 ms^-1#