Question

If the time period of a sound wave is 0.02 s, then what is its frequency?

• A. 50 Hz
• B. 100 Hz
• C. 25 Hz
• D. 500 Hz

Answer 1

Answer:

A. 50 Hz

The relationship between the time period (T) of a wave and its frequency (f) is given by the following formula:

f = 1 / T

Where:

• f = frequency (measured in Hertz, Hz)  

• T = time period (measured in seconds, s)  

In this case, the time period (T) is given as 0.02 s.

Let's calculate the frequency:

f = 1 / 0.02 s

f = 50 Hz

Therefore, the frequency of the sound wave is 50 Hz.