How submarine float and How the submarine really work/Diving and Surfacing

[MarkLaymon]

How submarine float and How the submarine really work/Diving and Surfacing​

How submarine float and sink?​

Submarines are incredible pieces of technology. Not so long ago, a naval force worked entirely above the water; with the addition of the submarine to the standard naval arsenal, the world below the surface became a battleground as well. The adaptations and inventions that allow sailors to not only fight a battle, but also live for months or even years underwater are some of the most brilliant developments in military history. In this Video, you will see how a submarine dives and surfaces in the water, how life support is maintained, how the submarine gets its power, how a submarine finds its way in the deep ocean and how submarines might be rescued.
See more information about submarines and submersibles at Coral Heads.

 

[MarkLaymon]

How submarine float?​

A submarine (or any boat) can float when the mass of water that it displaces (pushes out of the way) is equal to the mass of the boat. This displaced water causes an upward force called buoyancy. Buoyancy acts in the opposite direction to gravity, which would pull the ship down.

 

[MarkLaymon]

How do submarines rise and sink?​

In submarines, this is controlled by ballast tanks. When the tanks are empty, the submarine has less mass and it floats like a normal ship. As water is allowed into the tanks, the mass of the submarine increases, the downward gravitational force on the submarine increases and the submarine begins to sink.

 

[MarkLaymon]

How is a submarine able to float and sink in water?​

A submarine uses ballast tanks filled with compressed air and when needed the air is released and takes on water which increases the density making it sink but when the water is pushed out the sub's density is decreased making it float.