A sonar station picks up a return signal after 3 seconds. How far away is the object?
(Speed of sound in water = 1440 m/s).
Draw a neat and labelled diagram of the human ear. With the help of this diagram, explain the construction and working of the human ear.
The drawing shows a ship 800 m from a cliff. A gun is fired on the ship. After 5 seconds the people at the front of the ship hear the sound of the gun again.