If the period of a wave is 0.05 s, then what is its frequency?

20

Solution:

We Know that frequenency is defined as the number of times something happens within a specific period of time.

Frequency is related with time by following formula

Frequency=

Here T is time period=.05

Therefore,

Frequency=

Frequency=20

i think the answer is a, hope this : )

i believe the answer is a hope it and is correct