Stress-Strain Curve in Materials Science
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Questions and Answers

What is the unit of stress in the SI system?

  • Kilograms per cubic metre
  • Joules per mole
  • Meters per second squared
  • Newtons per square metre (correct)

    • What does the symbol $\sigma$ represent in the stress–strain equation?

  • Force
  • Strain
  • Elongation
  • Stress (correct)

    • What is the formula for strain, $\varepsilon$, in terms of change in length and original length?

  • $\varepsilon = \frac{L-L_{0}}{L_{0}}$ (correct)
  • $\varepsilon = \frac{L_{0}}{L}$
  • $\varepsilon = \frac{L}{L_{0}}$
  • $\varepsilon = \frac{F}{A_{0}}$

    • In stress–strain curve plotting, which axis is conventionally assigned to strain?

    <p>Horizontal axis</p> Signup and view all the answers

    What does the symbol $A_0$ represent in the stress equation?

    <p>Original cross sectional area of the bar</p> Signup and view all the answers

    What is the estimated number of living animal species on Earth as of 2022?

    <p>7.77 million</p> Signup and view all the answers

    Which scientific study is concerned with the study of animal behaviors?

    <p>Ethology</p> Signup and view all the answers

    To which kingdom do animals belong?

    <p>Animalia</p> Signup and view all the answers

    What is the body plan of most living animal species?

    <p>Bilaterally symmetric</p> Signup and view all the answers

    Which group includes phyla such as arthropods, molluscs, flatworms, annelids, and nematodes?

    <p>Protostomes</p> Signup and view all the answers

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