What is viscosity?
Answer:
the property of a fluid that resists the force tending to cause the fluid to flowthe measure of the extent to which a fluid possesses this property
so water has a lower viscosity than syrup because syrup has more of the resistiong force than water
Thickness....like you.
well it describes a liquid that is thick and sticky and does not flow easily
hows that for you?
Its the measure of thickness of a liquid. Like water is not very viscous but oil is more so
how thick or thin a liquid is
Viscosity is a measure of the resistance of a fluid to deform under shear stress. It is commonly perceived as "thickness", or resistance to flow. 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 or inviscid fluid (Symon 1971).
When looking at a value for viscosity the number that one most often sees is the coefficient of viscosity, simply put this is the ratio between the pressure exerted on the surface of a fluid, in the lateral or horizontal direction, to the change in velocity of the fluid as you move down in the fluid (this is what is referred to as a velocity gradient). For example, at "room temperature", water has a nominal viscosity of 1.0 x 10-3 Pa∙s and motor oil has a nominal apparent viscosity of 250 x 10-3 Pa∙s. (Serway 1996, p. 440)
Etymology
The word "viscosity" derives from the Latin word "viscum" for mistletoe. A viscous glue was made from mistletoe berries and used for lime-twigs to catch birds.[citation needed]
resistance to flow in fluids.Syrup is very viscous for example but water isn't.
viscosity is a measure of how easily a liquid flows.water flows easily, tar or engine oil flows less easily so it has a higher viscosity than water.Among the most viscous liquids is ordinary window glass:asyou heat it up it's viscosity decreases and it will flow like soft toffee at about 650deg.C.
Hi.
Viscosity is "thickness", or resistance to flow.
It is gauged by a fluids internal Resistance to flow or movement
Hence water has a low viscosity and plant oils have a higher or thick viscosity
Newton also did some things on it too.
Hope it helps. ;)
the property of resistance to flow in a fluid or semifluid
Viscosity is a measure of a liquids resistance to flow. It is usually measure in units of stokes or centistokes. Ill give you an example. Imagine a long hollow glass tube. If you put water into it, what happens? The water will flow right through to the other end very fast.
Now take some honey and put it in the tube. It will take a much longer time for it to get to the other end. Therfore the honey is a much more viscous liquid.
There are factors that affect viscosity. One would be intermolecular forces. Also in the case of an organic molecule, molecules with long chains in turn will be more viscous than molecules with short chains. Basically the long chains have greater intermolecular forces because there are more atoms to attract to one another. The long chains become floppy and get entangled in one another, hence a greater viscosity.
viscosity can be confusing sometimes but it is ok. Viscosity is how liquid something is, for example molases in winter is more viscis (sp?) than water.
Try this experiment on viscosity, take a piece of cardboard and prop it at an angle, put globs of different liquids at the top, ketchup, mustard, molases, water, lemon juice, lotion etc. and see which takes longer to reach the bottom.
Viscosity -
The difficulty or resistance of moving layers of fluid past eachother, or the difficulty in moving these layers around an stationary object.
It's a property of fluids relating to their 'Ability to Flow'
Viscosity is a "Resistance" to flow. (Like a fluid Friction).
Honey, Syrup, Heavy oils, are thick and don't flow easily. They have a 'High' viscosity.
Water, Gasoline, Alcohols ..etc, all flow easily. They have a very 'Low' viscosity.
The higher a fluid's Viscosity Index (V.I.) the thicker it is and, the more difficult it is for it to flow.
Viscosity is a measure of the resistance of a fluid to deform under shear stress. It is commonly perceived as "thickness", or resistance to flow. Viscosity describes a fluid's internal resistance to flow and may be thought of as a measure of fluid friction.
Viscosity is usually a liquid property defined as shear stress divided by shear rate. It has SI units of Pascal seconds. In simple terms, this can be measured either by stirring the liquid at constant shear rate and measuring the resulting stress or apllying a constant stress and seeing how fast the liquid moves. It turns out that materials have a huge range of viscosities:
Molten glass = 1000000000000 Pa.s
Bitumen = 100000000 Pa.s.
Golden syrup = 100 Pa.s
Olive oil = 0.1 Pa.s
Water = 0.001 Pa.s
Air = 0.00001 Pa.s
So Golden syrup isn't just a bit more viscous than water, it is 100,000 times as viscous!
the resistance of a liquid to flow
VERY SIMPLE:- I m explaining 4 u
You know that some liquid flow faster than others. e.g. water flow faster than honey.To know the cause of this consider flow of liquid on a glass plate. The layer which is in contact with the glass plate remains almost stationary.The second layer moves a bit faster than the first layer and the third layer moves still faster.Thus in liquid each layer with gradually increasing speed.So u can say different layers in a liquid moves over one another with differen speeds.But due to intermolecular forces there is a resistance of one layer to the other.
"THE INTERNAL RESISTANCE TO FLOW IN LIQUID WHICH ONE LAYER OFFER TO THE ANOTHER LAYER TRYING TO PASS OVER IT IS CALLED VISCOSITY."
nOW IF THE INTER MOLECULAR FORCES ARE STRONG.
, THE VISCOSITY WILL BE HIGH.
for example water has higher viscosity than methanol because intermolecular forces in water are stronger than methanol.
THE UNITS USED FOR VISCOSITY ARE...POISE(P)
Now viscosity of a liquid decreases with rise in temprature. Because with rise in temp. the inter molecular forces become weak and the liquid flow faster.
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