State Archimedes’ principle. Give its two applications.

Q. (a) State Archimedes’ principle. Give its two applications.
(b) When an object is immersed in the fluid, name the two forces acting on it. 
Ans. (a) When a body is immersed fully or partially in a fluid, it experiences an upward force that is equal to the weight of the fluid displaced by it.
Applications: Lactometers, hydrometers.
(b) (i) Weight and (ii) Upthrust.

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