What is the SI unit of viscosity and surface tension?

kgs−2,kgm−1s−1.

What is the dimensional formula for surface tension?

Or, T = [M1 L1 T-2] × [L-1] = M1 T-2. Therefore, surface tension is dimensionally represented as M1 T-2.

What is the dimensional formula of critical velocity?

Critical velocity (VC) = Re η / ρ r r = radius of tube.

What is the dimensional formula of velocity gradient?

Therefore, Velocity gradient is dimensionally represented as [M0 L0 T-1].

What is SI unit of coefficient of viscosity η?

The coefficient of viscosity η is defined as the tangential force F required to maintain a unit velocity gradient between two parallel layers of liquid of unit area A. The SI unit of η is Newton-second per square meter (Ns. m^ – 2) or. Pascal-seconds (Pa .s)

What is unit of coefficient?

The coefficient of friction is dimensionless, meaning it does not have any units. It is a scalar, meaning the direction of the force does not affect the physical quantity.

What is the SI unit of velocity gradient?

SI unit of the velocity gradient is 1/sec = per second = How we get it just read below. In fluid mechanics and Continuum mechanics the velocity gradient describes how the velocity of a fluid changes between different points within the fluid.

Is velocity gradient a dimensionless quantity?

velocity gradient. Among the given quantities displacement gradient is a unitless quantitity.

What is the units of velocity gradient?

The SI Unit of the Velocity gradient is 1/sec= per second. In fluid mechanics and also the continuum mechanics, the velocity gradient describes the velocity of the fluid that changes between different points.

Is called velocity gradient?

The difference in velocity between adjacent layers of the fluid is known as a velocity gradient and is given by v/x, where v is the velocity difference and x is the distance between the layers. …

What is the unit of compressibility?

Usually, when we are talking about compressibility we can say that it is the inverse or reciprocal of the bulk modulus of elasticity. The SI unit of compressibility is mostly given as m2/n.

Is proportional to the velocity gradient?

The viscous drag is directly proportional to the velocity gradient. The coefficient of viscosity depends on the nature of the liquid. Hence, the viscous drag is dependent on the nature of the liquid.

Why viscous force is directly proportional to velocity gradient?

1 Answer. Now this says that viscouse force is directly proportional to velocity grandient. If we are to say viscous force is greater, won’t that retard the flow and cause a lesser value of du for the same dz. If there is no pumping of the force the flow of fluid get slower and slower and so the viscouse force.

What is velocity gradient Class 11?

The velocity gradient can be defined as the rate of change of velocity along with the distance. Acceleration- It is defined as the rate of change of velocity. dvdt=a[LT−1][T]=[LT−2] Length – It is a measure of the distance between two points.

What is critical velocity in physics class 11?

The speed and direction in which the flow of a liquid changes from through tube smooth to turbulent is known as the critical velocity of the fluid. There are multiple variables on which the critical velocity depends, but whether the flow of the fluid is smooth or turbulent is determined by the Reynolds number. 2.

Is surface tension a force?

Surface Tension: “The property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of its molecules.” The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension.

How can an organism use surface tension?

Insects, such as water striders, and spiders, such as fisher spiders, can glide or scamper across the surface of water. These critters are small enough that their weight can be supported almost entirely by surface tension, the relatively weak forces that hold water molecules together.

Can you break surface tension?

Nope. The whole ‘breaking the surface tension’ is a myth. You would splat no matter how many bullets you had. Unless you have a grenade launcher capable of creating vast amounts of gas bubbles in water under you.

What best explains the high surface tension of water?

Water expands and becomes less dense when it freezes. Which best explains the high surface tension of water? Water molecule has a bent shape.

Does sugar increase surface tension?

It has been reported in the literature that sugars such as dextrose and sucrose increase the surface tension of water. The effect was interpreted as a depletion of the solute molecules from the water-air interface.

How do we reduce surface tension?

Some liquids such as oil and kerosene can destroy surface tension in water. Adding soap or detergent reduces surface tension in water. Increasing the temperature of the liquid reduces surface tension.

Does adding soap to water increase the surface tension?

Adding soap lowers the water’s surface tension so the drop becomes weaker and breaks apart sooner. Making water molecules stick together less is what helps soaps clean dishes and clothes more easily.

What would happen if water didn’t have surface tension?

No surface tension/ energy would imply no intermolecular interactions and from there all non ideal models of the world fly out the window. There would be no phase transformations; everything would be an ideal gas, absent of molecular interactions.