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Submarines have the capability of taking on, or getting rid of ballast, to make themselves heavier or lighter as the situation requires.

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Q: Why submarines are able to submerge and surface?
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Related questions

What is the difference between a normal ship and a submarine?

Normal ships are designed to move on the surface of the water. Submarines are designed to be able to submerge and travel under the water's surface, as well as on the surface. When normal ships go down, they stay down. Submarines are able to come back up after they go down. All American submarines are nuclear powered. With the exception of Aircraft carriers, surface ships are powered conventially.


Why does the submarine float and submerge in water?

Submarines must be able to float to load and offload crew and cargo and to have repairs and maintenance. They are designed to submerge either for underwater exploration or to pass undetected by ships at the surface and planes and satellites above.


Why do ships float while submarines sink?

Submarines are designed with enough ballast and control systems to allow them to submerge and surface as needed.Surface ships are designed only with enough ballast and control systems to keep them on the surface. While they can sink just as well as submarines can, their ability to re-surface without a salvage operation is non-existent.


What is another word for going under something?

"Subduction" is what the earth does. Submarines "submerge".


How do submarines control their density?

By their pumps and ballast-tanks: allowing water into the tanks to raise the vessel's density so can submerge, or pumping air into the tanks to displace the water and allow the submarine to surface.


What is the opposite of submerge?

Dry, surface...


When water fills a submarines flotations tanks the overall density of the submarine?

The density will rise and submerge the submarine.


What is the maening of submerge?

to sink below the surface of water


Problems with submarines?

All submarines can sink. Some can return to the surface.


What is a ballast tank?

A ballast tank is one of several external or internal tanks fitted in submarines, which allow the boat to submerge when filled with water.


What is the root word for submerge?

The root word for submerge is "merge," which means to combine or blend. The prefix "sub-" means under or beneath, so submerge means to put something below the surface of water or liquid.


How do you use submerged in a sentence?

(Submerge is a verb meaning to put under water or to go below the surface of the water. It can also mean to obscure or subordinate. Also submerse.)Examples:The toddler wanted to submerge all his toys in the bathtub, but his mother took them away.He stood on the dock, watching the pieces of the boat submerge.Her career threatened to submerge her personal life.