how does the submarines work?

Answer 1

A ship, submarine or even a bottle with a cork will float when the weight of the water it pushes aside (displaces) is equal to its own weight. When a boat is put in the water, it displaces, or pushes water aside, and creates an upward force. This force is called the buoyant force. It acts opposite to the force of gravity.

The density, or how solid an object is, also affects a ship's ability to float.

Generally, things that are denser than water will sink. However, if the space (volume) inside an object is large enough (like an empty can), it will push enough water molecules out of the way to create an upward force greater than its weight. That's why something as small and dense as a pebble will sink straight to the bottom but an empty tin can that weighs the same amount will float.

For general submersion or surfacing, submarines use the forward and aft tanks, called Main Ballast Tanks or MBTs, which are opened and completely filled with water to submerge, or filled by pressurized air to surface. Under submerged conditions, MBTs generally always stay flooded, which simplifies their design, so on many submarines these tanks are simply a section of interhull space. For more precise and quick control of depth, submarines use smaller Depth Control Tanks or DCTs, also called hard tanks due to their ability to withstand higher pressure. The amount of water in depth control tanks can be controlled either to reflect changes in outside conditions or change submersion depth. Depth control tanks can be located either near the submarine's centre of gravity, or separated along the submarine body to prevent affecting trim.

Answer 2

A submarine is equipped with ballast tanks, which are enclosure that can be filled to various level with water from the outside. When the tanks are filling with water, the submarine gets ehavier and sinks. When that water is pumped out, the sumbarine gets lighter and rises.
Then, there is the matter of propulsion. A submarine can use an electric motor running on batteries to move under water; and the batteries get recharged when the submarine is on the surface and can then run a diesel engine. Or a submarine can have a nuclear power plant, which gives it virtually unlimited range.
Recently, new technologies have been explored (fuel cells, regenerative combustion, etc) to try and get nearly as much freedom to a submarine as nuclear power allows without having to resort to use nuclear engines.

Answer 3

This question is a bit vague, but I'll give you the basics. Submarines are obviously airtight, or if you prefer, waterproof. This means that no unwanted water can get in.

They have ballast tanks. These are tanks that have openings to let water in, with valves to control and stop the flow of water. They also have air pumps. When air is pumped into a ballast tank, it forces the water out.

When a submarine wants to dive they fill the ballast tanks with water. When they want to suface, they pump air back in, and this makes the submarine buoyant again.

Modern subs are nuclear powered. The nuclear generator makes steam which powers all the electrical processes of the sub. They even make their own air, and some are able to stay submerged for months.

Answer 4

It is a matter of Air Pressure. The Diving Bell was the first attempt of a submersible diving platform. Ballast and Air make them go down and come up. On launch ballast is needed to dive, after a certain depth is reached some ballast is released and a buoyancy is reached. Buoyant means neither rising or falling. After a time ballast is released or air is exchanged for water ballast and the Submarine will surface. It is rather complicated. That is the general theory. sort of.

Answer 5

My submarine would be a pink SUBMARINE, too! even though, the colour "yellow" has greater syllables to artwork with in a music. In my 5th grade year, somebody made a partial parody of the lyric to the universal Beatles' music "Yellow Submarine". They began, "all of us stay in a yellow submarine; A rotten tangerine; A can of refried beans."