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

The value of tension in a long thin metal wire has been changed from $T_{1}$ to $T_{2}$. The lengths of the metal wire at two different values of tension $T_{1}$ and $T_{2}$ are $l_{1}$ and $l_{2}$ respectively. The actual length of the metal wire is:

Distinguish between a liquid body and a solid body.

Explain Hooke's Law.

Under the elastic limit,the stress is:

Define shearing stress and write its formula.