What is a brittle material.

What mass of Carbon $\left(\mathrm{in} \mathrm{grams}\right)$ is present in $0.01 \mathrm{mole}$ of Buckminster fullerene?

$\left[\mathrm{Atomic} \mathrm{mass} \mathrm{of} \mathrm{carbon}=12 \mathrm{u}\right]$

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$

Determine the region where Hooke’s law is obeyed, the ultimate strength point and fracture point in the given stress-strain graph.