Buoyancy and Archimedes Principle

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Buoyancy and Archimedes  Principle Empty Re: Buoyancy and Archimedes Principle

Post by Aneesh Yadav on Fri Dec 11, 2015 5:15 pm

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This means whether or not an object will float or sink depends on its own density and the density of the liquid it is placed in. In the case of water, an object with a density less than 1 g/cm3 will float. The closer its density is to 1 g/cm3, the more of it will sit below the water level. An object with a density of 0.5 g/cm3 will sit half in and half out of the water. Three quarters of an object with an density of 0.75 g/cm3 will be submerged.

Another way to look at the buoyancy of an object is as an interaction of two forces.

The force of gravity (Fg) pulling an object down. This is the weight of the object; its mass time the acceleration due to gravity (9.8 ms-2 on Earth). It is a force and is expressed in Newtons (N).
The buoyant force (Fb) holding the object up. This can be measured as the force of gravity acting on a mass of water equal to the amount of water the object displaces when fully immersed. This is also expressed in Newtons. Idea Idea Idea Rolling Eyes Rolling Eyes Razz
Aneesh Yadav
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Buoyancy and Archimedes  Principle Empty Buoyancy and Archimedes Principle

Post by DAV Science Teacher on Wed Oct 21, 2015 9:00 pm

why some objects float / sink in water? Question

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