Submarines, lactometers, hydrometers, etc. are designed according to __________.

Archimedes' principle

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Bernoulli's principle

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Principle of fluid flow

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All of the above

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Solution

The correct option is A Archimedes' principle
Archimedes' principle is an important work in Physics and has many interesting applications. It is used for designing submarines, ships, etc. Lactometers and hydrometers which are used to check the purity of milk and density of liquids respectively, are also based on this principle.

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