Rheology and Viscosity

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Questions and Answers

What is the definition of rheology?

The study of matter under pressure
The study of the elasticity of materials
The study of the deformation of matter under stress (correct)
The study of the resistance of a fluid to flow

Which type of deformation is reversible and exhibited by elastic bodies?

Spontaneous deformation
Elastic deformation (correct)
Plastic deformation
Permanent deformation

Which type of liquids follow Newtonian’s law of flow and have constant viscosity?

Diluted suspensions
Water and glycerol (correct)
Colloidal suspensions and emulsions
Ointments and gels

What does viscosity express in a fluid?

<p>The resistance to flow (B)</p> Signup and view all the answers

Which type of deformation is permanent and exhibited by viscous bodies?

<p>Irreversible deformation (C)</p> Signup and view all the answers

Flashcards

What is Rheology?

The study of how matter changes shape under pressure. Imagine squeezing playdough - that's rheology in action!

Elastic Deformation

A temporary change in shape that a material returns to after the pressure is removed. Like stretching a rubber band, it goes back to its original size.

What are Newtonian fluids?

Liquids that flow smoothly and predictably, with a constant resistance to flow. Think honey drizzling out of a bottle.

What does Viscosity mean?

Describes how thick or thin a fluid is. Think honey being thick and water being thin.

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Irreversible Deformation

A permanent change in shape that doesn't go back to its original form. Think clay being molded into a shape.

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Study Notes

Rheology

Rheology is the study of the flow and deformation of materials.

Deformation

Elastic bodies exhibit reversible deformation.
Viscous bodies exhibit permanent deformation.

Fluid Dynamics

Newtonian fluids are a type of liquid that follow Newton's law of flow and have a constant viscosity.
Viscosity is a measure of a fluid's resistance to flow, expressing the frictional force that arises between adjacent layers of fluid.

Note: Rheology is a broad field that encompasses the study of both solids and fluids, but the questions provided primarily focused on fluids, so the study notes are accordingly tailored.