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A liquid is allowed to flow into a tube of truncated cone shape. Identify the correct statement from the following.

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Important Questions on Properties of Matter

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For small areas of the orifice, the velocity of efflux of a liquid through an orifice in the bottom of the tank depend upon, 
MEDIUM
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IMPORTANT
The velocity of water in a river is 18 km h-1 near the surface. If the river is 5m deep, find the shearing stress between the horizontal layers of water. The coefficient of viscosity of water=10-2 poise.
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VITEEE
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Kerosene oil rises up in a wick of a lantern because of
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VITEEE
IMPORTANT
A rain drop of radius 0.3 mm has a terminal velocity in air of 1 m s-1. The viscosity of air is 8×10-5 poise. The viscous force on it is