Question

A person is sitting $200m$ away from a $20hertz$ sound source. What is the time interval at which successive compressions pulses from the source reach him?

Answer 1

Step 1: Given data

Distance $d=200m$

Frequency $f=20Hz$

Step 2: To find out the time interval at which successive compressions pulses from the source reach the man

The time interval at which successive compressions pulses from the source reach him is called the time period (T)

As we know the frequency $f=\frac{1}{T}$

So, $T=\frac{1}{f}$

$$\begin{gathered} \Rightarrow T=\frac{1}{20} \\ \Rightarrow T=0.05s \end{gathered}$$

Hence, the time interval at which successive compressions pulses from the source reach the man is equal to $0.05seconds.$