Newton's law of viscosity is a constitutive equation that describes how a fluid resists attempts to move through it. It holds true with some liquids and fails in others. Therefore, it is not considered a fundamental law of nature.Continue Reading
A Newtonian fluid has a constant viscosity, which means that it continues to act like a fluid independently of the stress applied to it. When force is increased, there is more resistance. This amount of exertion remains proportionate regardless of the amount of force applied.
Non-Newtonian fluids do not have a constant viscosity. The resistance of the liquid varies depending on the amount of force administered. Oobleck is considered to be a non-Newtonian liquid because it behaves like a solid when enough force is applied.
According to About.com, a liquid with a low viscosity, water for example, is thin. A higher viscosity means that a liquid is thick, like honey. According to Wikipedia, a liquid's viscosity usually depends on its composition and temperature, even if it is a Newtonian liquid.
There are other factors that can affect a liquid's viscosity, such as exposure to a magnetic field. Many non-Newtonian fluids deviate from the law, including shear thinning or thickening liquids, thixotropic liquids, rheopectic liquids and Bingham plastics.Learn more about Motion & Mechanics
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The Archimedes Principle (called the law of buoyancy), states any vessel partially or totally submerged in a fluid has an upward force acting upon it that is equal in magnitude to the weight of the fluid displaced by the vessel. The volume of the displaced fluid also equals the volume of the submerged portion of the vessel.Full Answer >
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The difference between high and low viscosity is the thickness of the material being measured. Low viscosity refers to substances that are thin, such as water, while high viscosity substances are thick. An example of a high viscosity liquid is syrup.Full Answer >