What is viscocity?(maybe i got the spelling wrong)?

Question

of water or give me its definition

Answer 1

its a measure of the resistance of a fluid to deform under shear stress. Basically how thick a liquid is. Honey is therefore more viscous than water.
The viscosity of water @ 20deg celsius is 1.002 mPa(pascals second)

Answer 2

The viscosity of any fluid (liquid or gas) is a measurement of its rate of flow. Molassas has a higher viscosity than water, which has a higher viscosity than air. Viscosity is also affected by temperature, with colder fluids being more viscous than their warmer counterparts, hence the need to "warm up" an automobile engine on a cold day: you want the oil to be flowing freely through the crankcase before you begin driving.

Answer 3

Viscosity is a measure of the resistance of a fluid to deform under shear stress. It is commonly perceived as "thickness", or resistance to pouring. Viscosity describes a fluid's internal resistance to flow and may be thought of as a measure of fluid friction. Thus, water is "thin", having a lower viscosity, while vegetable oil is "thick" having a higher viscosity. All real fluids (except superfluids) have some resistance to shear stress, but a fluid which has no resistance to shear stress is known as an ideal fluid (Symon 1971).

Answer 4

Viscosity is the resistance of fluids to motion. For example, water has relatively low viscosity and flows fast while syrup has high viscosity and flows slowly.

There are two systems on which viscosity is expressed: dynamic or absolute viscosity measured in Poises and kinematic viscosity measured in Stokes.

Answer 5

It is the force which hinders the motion of water by friction

F = f *v where F viscosity force v speed f friction coefficient which is directly correlate to viscosity

by formula f = 6 *Pi*r * viscosity

r radius of a molecule of water

Answer 6

Viscosity is a measure of the resistance of a fluid to deform under shear stress. It is commonly perceived as "thickness", or resistance to pouring. Viscosity describes a fluid's internal resistance to flow and may be thought of as a measure of fluid friction. Thus, water is "thin", having a lower viscosity, while vegetable oil is "thick" having a higher viscosity. All real fluids (except superfluids) have some resistance to shear stress, but a fluid which has no resistance to shear stress is known as an ideal fluid (Symon 1971).

Viscosity's Measurement
Viscosity is measured with various types of viscometer, typically at 25 °C (standard state). For some fluids, it is a constant over a wide range of shear rates. The fluids without a constant viscosity are called Non-Newtonian fluids.

In paint industries, viscosity is commonly measured with a Zahn cup, in which the efflux time is determined and given to customers. The efflux time can also be converted to kinematic viscosities (cSt) through the conversion equations.

Also used in paint, a Stormer viscometer uses load-based rotation in order to determine viscosity. It uses units, Krebs units (KU), unique to this viscometer.

Gases
Viscosity in gases arises principally from the molecular diffusion that transports momentum between layers of flow. The kinetic theory of gases allows accurate prediction of the behaviour of gaseous viscosity, in particular that, within the regime where the theory is applicable:

Viscosity is independent of pressure; and
Viscosity increases as temperature increases.
In liquids, the additional forces between molecules become important. This leads to an additional contribution to the shear stress though the exact mechanics of this are still controversial. Thus, in liquids:

Viscosity is independent of pressure (except at very high pressure); and
Viscosity tends to fall as temperature increases (for example, water viscosity goes from 1.79 cP to 0.28 cP in the temperature range from 0 °C to 100 °C); see temperature dependence of liquid viscosity for more details.
The dynamic viscosities of liquids are typically several orders of magnitude higher than dynamic viscosities of gases
Viscosity of air
The viscosity of air depends mostly on the temperature. At 15.0 °C, the viscosity of air is 1.78 × 10−5 kg/(m·s). You can get the viscosity of air as a function of altitude from the eXtreme High Altitude Calculator


Viscosity of water
The viscosity of water is 8.90 × 10-4 Pa·s or 8.90 × 10-3 dyn·s/cm2at about 25 °C.


Viscosity of various materials

Example of the viscosity of milk and water. Liquids with higher viscosities would not make such a splash.The Sutherland's formula (Crane, 1988) can be used to derive the dynamic viscosity as a function of the temperature:
where:

μ = viscosity in (Pa·s) at input temperature T
μo = reference viscosity in (Pa·s) at reference temperature To
T = input temperature in kelvins
To = reference temperature in kelvins
C = Sutherland's constant

Answer 7

Viscosity means the thickness of a fluid., the more viscous something is, the thicker it is. So, water hasn't much viscosity, but blood has.

Answer 8

FIrst you must know what a fluid is: A fluid is anything that flows.

Viscosity: Viscosity is a fluid's resistance to flow ( sweet and simple)

water is more viscous than air.

Answer 9

it is the frictional force between two layers of fluid
viscocity of water is 1

Answer 10

viscosity is the property of the liquid which resists the flow of liquid.consider a liquid in motion. it consists of number of liquid layers. the velocityof the liquied layers decrease from the top layer to the bottom layer. this is due to internal friction between the layers. it is called viscosity