Question

What is a submarine? How can it be made to dive in water

and come to the surface of water.​

Answer 1

Answer:

It is provided with water tanks. When the submarine is to dive, water is filled in water tanks, it is made heavier and average density of submarine becomes greater than the density of seawater and it sinks. To make the submarine rise to the surface of the water, water tanks are emptied.

Answer 2

Answer:

Submarine is a device that submerges in water .It is mainly used by the navy.

Explanation:

I think this will help you and so please like and mark it as the brainliest.