Question

Please Help!

Sound waves are traveling through the air. Every ½ second, the sound waves pass a detector. Which of the following choices correctly describes the period and frequency of these waves?

The period is 2 s, and the frequency is 2 Hz.
The frequency is ½ second, and the period is 2 Hz.
The period is ½ second and the frequency is ½ Hz.
The period is ½ second, and the frequency is 2 Hz.

Please Help!

Answer 1

The period is ½ second, and the frequency is 2 Hz.

Step-by-step explanation:

Period

Since period, T = time for one cycle, the sound waves passes through the detector every 1/2 second. So, it period is 1/2 second.

Frequency

Its frequency, f = number of cycles per second = 1/T = 1÷(1/2) = 2 Hz

The period is ½ second, and the frequency is 2 Hz.