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Mechanical Properties of Fluids

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Physics Part II

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Physics

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Class 10 Class 12

Mechanical Properties of Fluids

Write an expression for buoyant force exerted by liquid when immersed in liquid.

The buoyant force on body is,

U = Vρg

where,
V is the volume of body immersed in liquid,and
ρ is the density of liquid.

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Does the force of buoyancy depend upon the mass of the body?

Force of buoyancy depends upon the mass of liquid displaced and does not depend upon the mass of the body.

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What are the factors on which the buoyant force depends?

The factors on which the buoyant force depends are:

i) volume of body inside the liquid,
ii) density of liquid, and
iii) acceleration due to gravity.

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Why does ice float over water?

Ice floats over water because the density of ice is less than that of water.

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A body of density twice the density of water is first weighed in water and then in glycerine of density 1.3gm/cc. In which case the body appears to be lighter?

Density of glycerine is higher than water. So, glycerine exerts more buoyant force and hence the body will appear lighter in glycerine than in water.

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