Viscosity is most closely related to:

Viscosity of the fluids is analogous to:

The main cause of viscosity is:

The arrow with a pointed tip can move faster in air than that of with a blunt tip.

Viscosity is the property by virtue of which a liquid:

The cause of viscosity of liquid is:

Viscosity is exhibited by:

Aeroplanes are streamlined to reduce ....................... friction.

The dimensions of velocity gradient are:

The viscous drag is:

For an ideal fluid, viscosity is:

The total area of wings of an aeroplane is $10\, m^2$. the speed of air above and below the wings is 140 m/s and 110 m/s. Then the force on the aeroplane by air is ? $(P _A=1.28\dfrac{Kg}{m^3})$

Viscous force a is similar to friction in solids ,but viscous force
a. is independent of area but friction depends on area
b. is temperature dependent while friction force between solids depends upon normal reaction
c. is velocity dependent while friction is velocity independent

The viscous force on a small sphere of radius $R$ moving in a fluid varies as 

Why does the cotton wick in an oil filled lamp keep on burning?

When a ball is released from rest in a very long column of viscous liquid, its down ward acceleration is $a'$ (just after released). Its acceleration when it has acquired to third of the maximum velocity is $a/X$. Find the value of $X$.

A liquid rises in a capillary tube when the angle of contact is:

Two solid metal balls of radii $r$ $2r$ are falling with their terminal speeds in a viscous liquid.What is the ratio of drag force acting on these two balls?

We have three beakers A, B and C containing glycerine, water and kerosene respectively. They are stirred vigorously and placed on the table. The liquid which comes to rest at the earliest is

When $200 ml$ of water is subjected to a pressure of $2 \times {10^8}pa,$ the decrease in its volume is $0.2 ml.$ the compressibility of water is -----

A water hose 2 cm in diameter is used to fill a 20 litre bucket. If it takes 1 minute to fill bucket with watch velocity it leaves the hose ,

An air bubble of diameter 2mm rises steadily througha solution of density $1750 kg/m^3$at the rate of $0.35cm/s$.Calculate the coefficient of viscosity of the solution.The density of air is negligible. 

Blood vessel is $0.10\ m$ in length and has a radius of $1.5\times{10}^{-3}m$. Blood flows at rate of ${10}^{-7}{m}^{-3}/s$ through this vessel. The pressure difference that must be maintained in this flow, between the two ends of the vessel is $20\ Pa$. What is the viscosity sufficient of blood?

A U-tube having identical limbs is partially filled with water. An immiscible oil having a density of 0.8 g/cc is poured into one side until the water rises by 25 cm on the other side. the level of oil will stand higher than the water level? 

A small sphere of mass M and density $D _1$ is dropped in a vessel filled with glycerine. If the density of glycerine is $D _2$ then the viscous force acting on the ball will be in Newton.

The viscous drag on a spherical body moving with a speed V is proportional to:

An air bubble of radius $1 \,cm$ is found to rise in a cylindrical vessel of large radius at a steady rate of $0.2 \,cm$ per second. If the density of the liquid is $1470 \,kg \,m^{-3}$, then coefficient of viscosity of liquid is approximately equal to

A capillary tube of area of cross-section A is dipped in water vertically. The amount of heat evolved as the water rises in the capillary tube up to height h is: (The density of water is $\rho$)

Viscous force is somewhat like friction as it opposes, the motion and is non-conservative but not exactly so, because

A liquid flows between two parallel plates along the x-axis. The difference between the velocity of two  layers separated by the distance $dy$ is $dv$. If $A$ is the area of each plate, then Newton's law of viscosity may be written as:

If the shearing stress between the horizontal layers of water in a river is $1.5 mN/ m^{2}$ and $\eta  _{water}= 1\times10^{-3}Pa-s$ , The velocity gradient is:

An air bubble of radius $1 mm$ moves up with uniform velocity of $0.109ms^{-1}$ in a liquid column of density $14.7 \times 10^{3} kg/m^{3}$, then coefficient of viscosity will be ($g = 10ms^{-2}$)

Match List I with List II and select the correct answer using the codes given below the lists :

The space between two large horizontal metal plates 6 cm apart, is filled with 
liquid of viscosity 0.8 $N/m^2.$ A thin plate of surface area 0.01 $m^2$ is moved  parallel to the length of the plate such that the plate is at a distance of 2 m  from one of the plates and 4 cm from the other. If the plate moves with a  constant speed of 1 m $s^{-1}$, then

A solid ball of density half that of water falls freely under gravity from a height of 19.6 m and then enters the water. Up to what depth will the ball go? How much time will it take to come again to the water surface. Neglect air resistance and viscosity effects in water. ($
g=9.8 \mathrm{ms}^{-2}
$)

A spherical ball of radius $3\times 10^{-4}\ m$ and density $10^{4}\ kg\ m^{-3}$ falls freely under gravity through a distance $h$ before entering a tank of water. If after entering the water, the velocity of the ball does not change, then the value of $h$ is (Given, $viscosity >of> water=9.8\times 10^{-6}\ Nsm^{-2}$ and $\rho _{water}=10^{3}\ kgm^{-3}$)