The graph $AB$ shown in figure is a plot of temperature of a body in degree Celsius and degree Fahrenheit. Then,

The figure below shows four isotropic solids having positive coefficient of thermal expansion. A student predicts that on heating the solid, following things can happen. Mark true $\left(\mathrm{T}\right)$ or false $\left(\mathrm{F}\right)$ for comments made by the student.

(i) The angle $\alpha$ in figure $\left(1\right)$ will not change.

(ii) The length of line in figure $\left(2\right)$ will decrease.

(iii) The radius of inner hole will decrease.

(iv) The distance $AB$ will increase.

At STP, a rod is hung from a frame as shown in figure leaving a small gap between the rod and floor. The frame and rod system is heated uniformly up to $350 \mathrm{K}$. Then,