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There are many possibilities that SOME stones float: 1.Some stones float because may be their density would be lesser than that of the liquid immersed. 2.The amount of liquid displaced by the stone is more thanthat of the weigth of the stone. 3.Surface area of the stone is more and the buoyant force makes it float. 4.The weight of the stone is less tha that of the liquid in which it is immersed. Buoyant force is the upthrust expereinced by an object whe immersed in a FLUID(liquid or gas) ex: paper floats on water due to buoyant.parachuts fly due to this force. It always acts perpendicularly. I suppose you would like a real answer? The only stones that I know that float are volcanic. I am not sure but almost positive that the density of all things rock is atomically heavier than water and the reason for the floating rock is the structure of the rock, not the density of stone molecules themselves. Trapped air inside a rock will cause the rock to float. The air molecules even being exposed to the water will still cling to the rock if there is enough (cohesive?) force to hold the air in or on the rocks inner and outer structure causing the combined volume of displacement to be lighter than the fluid being displaced.

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17y ago

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