10 Questions
What is the unit of stress in the SI system?
Newtons per square metre
What does the symbol $\sigma$ represent in the stress–strain equation?
Stress
What is the formula for strain, $\varepsilon$, in terms of change in length and original length?
$\varepsilon = \frac{L-L_{0}}{L_{0}}$
In stress–strain curve plotting, which axis is conventionally assigned to strain?
Horizontal axis
What does the symbol $A_0$ represent in the stress equation?
Original cross sectional area of the bar
What is the estimated number of living animal species on Earth as of 2022?
7.77 million
Which scientific study is concerned with the study of animal behaviors?
Ethology
To which kingdom do animals belong?
Animalia
What is the body plan of most living animal species?
Bilaterally symmetric
Which group includes phyla such as arthropods, molluscs, flatworms, annelids, and nematodes?
Protostomes
Learn about the stress–strain curve, a fundamental concept in materials science and engineering. Understand how this curve is obtained, and how it reveals important material properties such as Young's modulus, yield strength, and ultimate tensile strength.
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