How does a submarine work? State and explain with the help of Archimedes' principle.

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Solution

Archimedes' Principle:- Buoyant force acting on an object immersed in a fluid is exactly equal to the weight of the fluid displaced by it, which is the statement of Archimedes' principle.
A submarine may float or sink in water as desired.
For this purpose large ballast tank is provided at the base of a submarine.
Gate of ballast tanks is opened so that seawater fills the ballast tanks so as to increase its weight.
As a result, the submarine sinks.

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