A bat hears the echo of its squeak after 0.1 s. How far is the obstacle from the bat? Speed of sond is 344 m/s.

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 ).

A bat emits ultrasonic sound of frequency 1000 kHz in air. If the sound meets a water surface, what is the wavelength of the transmitted sound? Speed of sound in air is 340 m s^-1 and in water 1486 m s^-1 .

An echo is heard after 4s. What is the distance of reflecting surface from the source, given that the speed of sound is 342 ms^-1 .

The time between a clap and its echo from a wall is 0.1 s. If the distance of the wall be 17.5 m, calculate the speed of sound.

An echo returned in 3 s. What is the distance of reflecting surface from the source ? Given that the speed of sound is 342 ms^ -1 .