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A spherical ball of iron of radius 2 mm is falling through a column of glycerine. If densities of glycerine and iron are respectively 1.3×103 kg m-3 and 8×103 kg m-3. η for glycerine =0.83 N m-2 sec, then the terminal velocity is

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Important Questions on Properties of Matter

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A rain drop of radius 0.3 mm has a terminal velocity in air =1 m s-1. The viscosity of air is 8×10-5 poise. The viscous force on it is
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A cylinder is filled with non-viscous liquid of density d to a height h0 and a hole is made at a height h1 from the bottom of the cylinder. The velocity of the liquid issuing out of the hole is
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The velocity of efflux of a liquid through an orifice at the bottom of a large tank does not depend upon
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Horizontal tube of non-uniform cross-section has radii of 0.1 m and 0.05 m respectively at M and N for a streamline flow of liquid the rate of liquid flow is

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Two drops of the same radius are falling through air with a steady velocity of 5 cm s-1 . If the two drops coalesce, the terminal velocity would be