Q:

What is Newton's law of viscosity?

A:

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.

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.


Is this answer helpful?

Similar Questions

  • Q:

    What is Stokes' law of viscosity?

    A:

    Stokes’ law of viscosity considers forces acting upon a spherical particle suspended in liquid to derive a mathematical formula for viscosity, using the velocity at which the particle will settle at the bottom, explains Encyclopaedia Britannica. Conceptually, the friction force acting upon the sphere in a viscous liquid is directly proportional to the velocity of the sphere, the radius of the sphere and the viscosity of the fluid.

    Full Answer >
    Filed Under:
  • Q:

    What is Newton's first law?

    A:

    Newton's first law states, "Every object persists in its state of rest or uniform motion in a straight line unless it is compelled to change that state by forces impressed on it." A more colloquial way of saying it is "an object in motion stays in motion."

    Full Answer >
    Filed Under:
  • Q:

    What is Newton's first law of motion?

    A:

    Newton's First Law of Motion defines the concept of inertia. The law states that an object will remain in its original state of motion until acted upon by an outside force.

    Full Answer >
    Filed Under:
  • Q:

    What is Newton's second law of motion?

    A:

    Newton's second law of motion is Force = Mass x Acceleration. What this states is that the acceleration of an object is dependent upon two variables, which are the net force acting upon the object and the mass of the object.

    Full Answer >
    Filed Under:

Explore