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Viscosity?

Jan 22, 2007 by Elisha | Posted in Chemistry

What are some of the scientific uses of viscosity?

God Bless,
Elisha

Blood. If its too thick then it can clot and cause a heart attack or stroke, or if its too thin can bleed from a small cut for hours. Doctors have to know the viscosity of your blood when performing operations.

viscosity?

Jan 18, 2007 by Matt | Posted in Chemistry

having trouble about how the particles in substances
why would water have the lowest viscosity?
why would vegetable oil have a higher viscosity then water? even though its a lubricant
corn and maple syrup

Viscosity is an internal property of a fluid that offers resistance to flow. For example, pushing a spoon with a small force moves it easily through a bowl of water, but the same force moves mashed potatoes very slowly. In fact, one of the major differences between styles of mashed potatoes is the viscosity of the starchy mass: some people like their potatoes running and teeming with milk and butter (they are fans of low-viscosity potatoes), while others like their potatoes drier and stickier, so they almost crack rather than flow (these people are devoted to high-viscosity potatoes).

There are many ways to measure viscosity, including attaching a torque wrench to a paddle and twisting it in a fluid, using a spring to push a rod into a fluid, and seeing how fast a fluid pours through a hole. This exercise uses one of the oldest and easiest ways: we will simply see how fast a sphere falls through a fluid. The faster the sphere falls, the lower the viscosity. This makes sense: if the fluid has a high viscosity it strongly resists flow, so the sphere falls slowly. If the fluid has a low viscosity, it offers less resistance to flow, so the ball falls faster.

How does the viscosity of biodiesel compare to the viscosity of petroleum-based fuels?

Jan 20, 2009 by hss3468 | Posted in Chemistry

How does biodiesel's viscosity compare to petroleum-based fuels? Also, why is viscosity a factor to consider for fuels?

It's about the same. Viscosity is important because, say if you tried using straight vegetable oil as fuel, which is about 5 times more viscous than diesel, this would clog engine components such as fuel injectors. In this instance, an engine would need modifying to cope with this, either to pre-heat and therefore thin the oil before it enters the injectors, or by installing a 2 tank system whereby the car is run on normal diesel until warm and then switched over to biodiesel. It's better to use biodiesel, which can be made from vegetable oil. See http://www.biodieselbooklet.co.uk.

Viscosity

The behavior of a flowing fluid depends on various fluid properties. Viscosity, one of the important properties, is responsible for the shear ...

Thickening composition having improved viscosity-emerging property ...

The present invention relates to a thickening composition in which viscosity conveniently emerges by adding the composition to a desired product containing water, and the present invention particularly relates to a thickening composition havingan improved viscosity-emerging property, which is suitable for food applications for conveniently thickening refreshing beverage, gravy sauce, sauce, salad dressing, soup, mousse, jelly or the like, or applications in which viscosity emerges by addingthe composition in a small amount to a diet or the like of a patient is experiencing difficulty in chewing and swallowing due to eating disorder. A xanthan gum is soluble in cold water, and a solution obtained shows a high pseudo-plastic viscosity. This solution is considered to form a weak, gel-like network, so that the solution is very excellent in dispersion or emulsification stabilityof an insoluble solid content or a fat or oil at a relatively low viscosity. In addition, the solution is excellent in heat resistance, acid resistance and freezing resistance. Since various resistances are high, the xanthan gum has been used invarious fields such as foods, cosmetics and chemicals. In order to effectively use a xanthan gum, it is necessary that the xanthan gum is completely hydrated at first, and the viscosity emerges for the first time upon the complete hydration. When a general consumer or the like uses a xanthan gum ina food or the like, the xanthan gum is likely to be in a state of a so-called "lumpy mass," wherein only a surface of the xanthan gum is dissolved, while its internal remains in a powder state. A xanthan gum in a lumpy mass is incomplete in hydration,so that the xanthan gum is likely to be in a state that cannot exhibit its function. When the xanthan gum is hydrated, the viscosity-emerging rate has a tendency of being fast as the particle size of the xanthan gum is finer, and being slow as the particle size is larger. In addition, the xanthan gum having a finer particle...

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Viscosity - Wikipedia, the free encyclopedia
The substance above has lower viscosity than the substance below ... Viscosity is a measure of the resistance of a fluid which is being deformed by either ...

Brookfield Engineering Labs
Manufacturer of viscometers, rheometers, and viscosity measurement and control equipment.

viscosity: Definition, Synonyms from Answers.com
Viscosity is a major factor in determining the forces that must be overcome when fluids are used in lubrication or transported in pipelines. ...

Viscosity
Viscosity on WN Network delivers the latest Videos and Editable pages for News & Events, including Entertainment, Music, Sports, Science and more, Sign ...