Question

a wave with a period of 0.008 seconds has a frequency of
a) 12.5 hz.
b) 125 hz.
c) 800 hz.
d) 80 hz.

Explanation:

Step1: Recall frequency-period relation

Frequency $f = \frac{1}{T}$, where $T$ is period.

Step2: Substitute given period value

$T = 0.008\ \text{s}$, so $f = \frac{1}{0.008}$

Step3: Calculate the result

$\frac{1}{0.008} = 125\ \text{Hz}$

Answer:

B) 125 Hz.