Question

What is a submarine ? How can it be made to dive in water and come to the surface of water?

Answer 1

Submarines have one of the most diverse types and capabilities of any form of vessel. They range from small autonomous examples and one- or two-person submarines that operate for a few hours to submarines that can stay submerged for six months, such as the Russian Typhoon class, the world's largest submarines. Submarines can work at depths that human divers cannot survive or are not practicable.

Complete step by step solution:
A submarine is a submersible vessel that can operate independently underwater. It is not the same as a submersible, which has restricted underwater capabilities. It is also often used to refer to remotely driven vehicles and robotics, as well as medium-sized or smaller boats, such as the midget submarine and the wet sub, in historical or colloquial contexts. Regardless of their size, submarines are referred to as "boats" rather than "ships."
A submarine, like other ships, may float because the weight of the water it displaces is equivalent to the ship's weight. This indicates that the pressure exerted by the submarine on the water is equal to the pressure exerted by the water on the ship. The term for this phenomenon is buoyant force. A submarine, a pirate ship at sea, or a rubber duck floating in your bathtub all use buoyant force. A submarine, on the other hand, differs from conventional ships in that it can adjust its buoyancy. This implies the submarine skipper has complete control over whether the submarine sinks or rises to the surface. The submarine relies on unique tanks that can be filled with water or air to adjust buoyancy. The tanks are filled with air to return to the surface. This causes the submarine to float to the surface because it is less dense than the water surrounding it. The air is expelled through a vent, and the tanks are inundated with water when the captain decides it's time to dive. The submarine becomes denser than the surrounding water, causing it to sink. To fill and replenish the tanks, a supply of air is carried on board. The tanks may be filled with high-pressure air in an emergency to swiftly restore the crew and the vessel to the surface.

Note: While living on a submarine may appear to be a pleasant experience, it is not without its difficulties. Maintaining air quality, fresh water availability, and temperature are the three most pressing issues. Nitrogen, oxygen, argon, and carbon dioxide are the four gases that make up the air we breathe. When we take a deep breath, our bodies use oxygen. We exhale carbon dioxide as we breathe out. We don't use nitrogen or argon in any way.