S.I Unit of Frequency

Q.

A sound wave is passing through the air. 1000 compressions and rarefactions are passing through a point in one second. Which of the following is the frequency of the sound wave?

1. 1000 Hz

2. 1000 J

3. 1000 $s^{-1}$

4. 2000 Hz

Q. 20 vibrations are produced in a slinky in 10 sec when a jerk is given to it .Find its time period and frequency .How can a longitudinal wave produced in a slinky ?

Q. A person is listening to a tone of 500Hz sitting at a distance of 450 m from the source of the sound. What is the time interval between successive compressions from the source?

Q.

standing waves are produced in 10m long stretched string fixed at both ends. If the string vibrates in 5 segments and wave velocity is 20m/s the frequency is

1- 5hz

2-10hz

3-2hz

4-4Hz

Q. Question 4
A person is listening to a tone of 500 Hz sitting at a distance of 450 m from the source of the sound. What is the time interval between successive compressions from the source?