Question

two daily phenomena which are based on Archimedes principle .and the significance of Archimedes principle​

Answer 1

While they are related to it, the principle of flotation and the concept that a submerged object displaces a volume of fluid equal to its own volume are not Archimedes' principle. Archimedes' principle, as stated above, equates the buoyant force to the weight of the fluid displaced.

ex. ★ Bathing yourself in bathtub. Or swimming/floating in river. In defence submarines and ships are used. Like a ship floating on water