The pressure difference between the upper surface and lower surface of a submarine is 120 kPa. Find the height of the submarine.
12 m
2 m
8 m
4 m
A ship on the surface of water sends a signal and receives it back from a submarine inside water after 4 s. Calculate the distance of the submarine from the ship. (The speed of sound in water is 1450 m s−1).
What is a submarine? How can it be made to dive into the water and come to the surface of the water?