Question

What is the speed of a 16 cm wave with a period of 8 seconds?A) 48 cm/s B) 0.5 cm/sC) 200 cm/sD) 2 cm/s

Answer 1

T = period = 8 s

v= speed = ?

λ= wavelenght = 16 cm

First , calculate the frequency:

F = 1/T = 1 /8 = 0.125 s^-1 = 0.125 hz

Now, apply the formula:

v = λ x F

Replacing:

v = 16 cm x 0.125 s^-1 = 2 cm/s (option D)