The force of viscosity is...

The force of viscosity is

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A man is rowing a boat with a constant velocity v_(0) in a river. The contact area of boat is 'A' and coefficient of viscosity is eta . The depth of river is 'D' . Find the force required to row the boat.

A square plate of 1m side moves parallel to a second plate with velocity 4m/s. A thin layer of water exist between plates. If the viscous force is 2N and the coefficient of viscosity is 0.01 poise then find the distance between the plates in mm.

The dimensional formula for coefficient of viscosity is

The fundamental quantity which has the same power in the dimensional formula of surface tension and coefficient of viscosity is

When a liquid flows in a tube, there is relative motion between adjacent layers of the liquid. This force is called the viscous force which tends to oppose the relative motion between the layers of the liquid. Newton was the first person to study the factors that govern the viscous force in a liquid. According to Newton’s law of viscous flow, the magnitude of the viscous force on a certain layer of a liquid is given by F = - eta A (dv)/(dx) where A is the area of the layer (dv)/(dx) is the velocity gradient at the layer and eta is the coefficient of viscosity of the liquid. The dimensional formula for the coefficient of viscosity is :

What is viscosity ? Predict the order of viscosity among the following : ethanol, ethylene glycol and glycerol.

The unit of viscosity in the CGS system is poise (P) and that in SI is poiseuille (PI). Which of the following statement is correct ?

A small metal sphere of radius a is falling with a velocity upsilon through a vertical column of a viscous liquid. If the coefficient of viscosity of the liquid is eta , then the sphere encounters an opposing force of

The coefficient of viscosity has the dimensional formula

The coefficient of viscosity (eta) of a fluid moving steadily between two surface is given by the formula (f) = etaA dV//dx where f is the frictional force on the flluid, A is the area in the fluid, and dN//dx is velocity gradient inside the fluid at that area. The SI unit of viscosity is given as :

HC VERMA ENGLISH-SOME MECHANICAL PROPERTIES OF MATTER-Objective-1

When a metal wire elongates by hanging a load on it, the gravitational...
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By a surface of a liquid we mean
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An ice cube is suspended in a vacuum in gravity free hall. As the ice...
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When water droplets merge to form a bigger drop
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The dimension ML^-1T^-2 can correspond to
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Air is pushed into a soap bubble of radius r to double its radius. If ...
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If more air is pushed in a soap bubble the pressure in it
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If two soap bubbles of different radii are connected by a tube
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Figure shows a capillary tube of radius r dipped into water. If the a...
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The excess pressure inside a soap bubble is twice the excess pressurre...
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Which of the following graphs may represent the relation between the c...
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Water rises in a vertical capillary tube up to a length of 10 cm. If t...
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A 20 cm long capillary tube is dipped in water. The water rises up to ...
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Viscosity is property of
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The force of viscosity is
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The viscous force acting between two layers of a liquid is given by F/...
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A raindrop falls near the surface of the earth with almost uniform vel...
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A piece of wood is taken deep inside a long column of water and releas...
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A solid sphere falls with a terminal velocity of 20 ms^-1 in air. If i...
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A spherical ball is dropped in a long column of a viscous liquid. The ...
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