A persion clapped his hands in front of a wall and heard echo later 1s. If speed of sound m air is 330 m/s, find out the distance between the person and the wall.

A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sbund in water if the distance of.the object from the submarine is 3625. m

A man standing on the seashore has seen that the no of waves that hit the shore per mnute is 60. If speed of wave is 10m/s, find out the wave length.

A man’stationed between two hills fires a gun. He hears the first echo after 1 s and the second after 2 s. What is the distance between the hills. The speed of sound in air is 330 m/s.

A submarine emits a sonar pulse, which returns from an underwater cliff in 1.02 s. If the speed of sound in salt water is 1531m/s, how far away is the cliff?

A stationary sound wave has a frequency 165 Hz.Distance between two consecutive nodes is(speed of the sound in air = 330 m/s)

A person has a hearing range from 20 Hz to 20 kHz. What are the typical wavelengths of sound waves in air corresponding to these two frequencies? Take the speed of sound in air as 344 m s^-1 .

A train whistling while approaching a railway platform with a speed of 90 km(s)^-1 .The frequency of sound of the whistle is 600 Hz.If the velocity of sound in air is 325 m(s)^-1 ,calculate the apparent frequency of the sound of the whistle as heard by an observer standing on the platform.

A source oscillates 50 times in 5 s. If the distance between compression and rarefaction of the medium is 10m, find out the frequency, wavelength and speed of the wave.

A SONAR (sound navigation and ranging) uses ultrasonic waves to detect and locate objects under water. In a submarine equipped with a SONAR the time delay between generation of a probe wave and the reception of its echo after reflection from an enemy submarine is found to be 77.0 s. What is the distance of the enemy submarine? (Speed of sound in water = 1450 m s^(-1) )

The length of a cylindrical glass tube is 30 cm.the velocity of sound in air is 330 m(s)^-1 .What is the fundamental frequency of vibration of the air coloumn if (i)both ends of the tube are open and (ii)open end is closed and flat?