Physics Chapter: Elasticity and States of Matter
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Questions and Answers

What occurs when external forces are removed from an object that returns to its original shape and size?

  • Brittle behavior
  • Ductile behavior
  • Plastic behavior
  • Elastic behavior (correct)

What is the unit of measure for stress?

  • Pascal (correct)
  • Meter
  • Joule
  • Newton

How is elastic modulus calculated?

  • Elastic Modulus = $ rac{Stress}{Strain}$ (correct)
  • Elastic Modulus = $Stress - Strain$
  • Elastic Modulus = $Stress + Strain$
  • Elastic Modulus = $ rac{Strain}{Stress}$

What does strain measure in materials?

<p>Degree of deformation (A)</p> Signup and view all the answers

What happens to materials that are not elastic when external forces are removed?

<p>They remain deformed permanently. (C)</p> Signup and view all the answers

What characterizes the state of matter known as solids?

<p>They have strong bonds that make them rigid and difficult to deform. (A)</p> Signup and view all the answers

What happens to a solid when external forces are applied?

<p>It can return to its original shape when the force is removed. (D)</p> Signup and view all the answers

Which statement best describes the volume of liquids?

<p>Liquids have a fixed volume but their shape changes based on the container. (B)</p> Signup and view all the answers

How do gas molecules behave in relation to each other?

<p>They are widely spaced and experience virtually no intermolecular bonds. (C)</p> Signup and view all the answers

What can happen to a solid when it experiences a large enough external force?

<p>It might permanently deform or break. (B)</p> Signup and view all the answers

Flashcards

States of Matter

Matter exists as solid, liquid, or gas based on the strength of bonds between molecules.

Solid

A rigid state of matter with strong intermolecular bonds, maintaining a fixed shape and volume.

Liquid

A state of matter with weaker intermolecular bonds than solids, taking the shape of its container while maintaining a fixed volume.

Gas

A state of matter with virtually no intermolecular bonds, filling the entire container and adapting to its volume.

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Elastic Behavior

The tendency of a solid to return to its original shape and size when external forces are removed after deformation.

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Deformation

A change in the shape or size of an object caused by an external force.

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Elastic Behavior

The ability of a solid to return to its original shape and size after an external force is removed.

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Stress (in Solids)

Force per unit area causing deformation.

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Strain (in Solids)

Measure of deformation.

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Elastic Modulus

Constant of proportionality relating stress and strain in an elastic material.

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Stress Equation

Stress = Force/Area

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Unit of Stress

N/m² (Pascal, Pa) or dyne/cm²

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