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प्रश्न
A plastic cube is released into the water. Will it sink or come to the surface of the water?
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उत्तर
When a plastic cube is released into water, it will come to the surface and float if its density is lower than the density of water. This happens because of buoyancy. Water exerts an upward buoyant force on the cube, and if this force is equal to or greater than the cube’s weight, the cube floats.
In this experiment, the plastic cube floats because it is less dense than water. In contrast, a glass cube usually sinks because its density is greater than that of water, so its weight is greater than the buoyant force acting on it.
संबंधित प्रश्न
The S.I. unit of density is ..........
Describe a simple experiment to demonstrate that a liquid enclosed in a vessel exerts pressure in all directions.
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Pressure is .................... in all directions about a point in a liquid.
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Pressure at a point inside the liquid is ...................... To its depth.
The S.I. unit of pressure is :
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Complete the analogy.
Downward force : Weight :: Upward force offered by liquid : ______
