What are elastomers? Give examples of elastomers.

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(N/A) Elastomers are materials that can be stretched to a large extent and return to their original shape and size upon the removal of the stretching force. These materials exhibit a large elastic region in their stress-strain curve.
Examples of elastomers include:
$1$. Rubber (e.g.,vulcanized rubber).
$2$. Tissue of the aorta (the large tube carrying blood from the heart).
$3$. Elastin (a protein in connective tissue).

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Chapter

Mechanical Properties of Solids

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Basic of Elasticity, Stress and Strain relationship and Graphical analysis

The ratio of radii of two wires of same material is $2: 1$. If these wires are stretched by equal force,the ratio of stresses produced in them is .............

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Match the physical quantities in Column-$I$ with the details given in Column-$II$ appropriately:

Column-$I$ Column-$II$

$(a)$ $\text{Stress} \propto \text{Strain}$ $(i)$ $M^1 L^{-1} T^{-2}$

$(b)$ $\text{Dimensional formula for compressibility}$ $(ii)$ $M^{-1} L^1 T^2$

$(iii)$ $\text{Poisson's ratio}$

$(iv)$ $\text{Hooke's law}$

Column-$I$	Column-$II$
$(a)$ $\text{Stress} \propto \text{Strain}$	$(i)$ $M^1 L^{-1} T^{-2}$
$(b)$ $\text{Dimensional formula for compressibility}$	$(ii)$ $M^{-1} L^1 T^2$
	$(iii)$ $\text{Poisson's ratio}$
	$(iv)$ $\text{Hooke's law}$