A sonar device on a submarine sends out a signal and receives an echo 5s later. Calculate the speed of sound in water if the distance of the object from submarine is 3,625 m.

Light travels from air to water of refractive index 1.33. calculate the speed of light in water, if speed of light in air is 3.0xx10^8 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 submarine emits a sonar pulse, which returns from underwater cliff in 1.02 s. If the speed of sound in salt water is 1531ms^-1 how far away is the cliff ?

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.