Static electricity is the build up of an electrical charge on the surface of an object. Why is it called "static" electricity?*

Static electricity is the build up of an electrical charge on the surface of an object. It's called "static" because the charges remain in one area rather than moving or "flowing" to another area.

Explanation:

Option B. 0.3 Hz

Explanation:

From the question given above, the following data were obtained:

Period (T) = 3 s

Frequency (f) =?

Frequency is related to the period according to the following equation:

Frequency (f) = 1 / period (T)

f = 1/T

With the above formula, we can obtain the frequency wave as illustrated below:

Period (T) = 3 s

Frequency (f) =?

f = 1/T

f = 1/3

f = 0.3 Hz

Therefore, the frequency of the wave is 0.3 Hz