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The three balls of cork, alumium and lead of equal volume with specific gravities  ...

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tubee | Student, Grade 10 | Salutatorian

Posted April 11, 2013 at 5:56 PM via web

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The three balls of cork, alumium and lead of equal volume with specific gravities    0.2,2.7 and 11.3 respectively are immersed in water.                                                                                         Explain what is meant by buoyant force and what is the effect of it on each ball?Describe the behaviour of each ball after the effect of buoyant force.

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pramodpandey | College Teacher | Valedictorian

Posted April 13, 2013 at 7:39 AM (Answer #1)

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Specific gravity is the ratio of density of a substance compared to the density of fresh water at 4°C (39° F).

specific gavity of cork= 0.2

specific gravity of  alumium=2.7

specific gravity of lead =11.3 

The apparent loss of weight when an object submerged in a liquid  equal to the buoyant force the liquid exerts on object.In other words force exerted by liquid in upward direction on an object when it  submersed fully or partially ,is called buoyant force.

When an obejct immersed fully or partially ,the volume of liquid replaced by an object is same as volume of the object.Thus the buoyant force, is equal to the weight of the displaced liquid.

                  

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