The elastic limit for a gas

$A$ wire is hanged from the ceiling without any weight below it. Would there be any stress in the wire?

In a crystal,the atoms are located at the position of

Hooke's law is applicable for ....

Two wires as shown in the figure below, made of steel, have a breaking stress of $12 \times 10^8 \text{ N/m}^2$. The area of cross-section of the upper wire is $0.008 \text{ cm}^2$ and that of the lower wire is $0.004 \text{ cm}^2$. The maximum mass that can be added to the pan without breaking any wire is . . . . . . kg. (Take $g = 10 \text{ m/s}^2$)

The load versus elongation graph for four wires of the same material is shown in the figure. The thinnest wire is represented by the line