(A) Moment of inertia of the rigid body only dependent on the mass of the body and position of the axis of rotation. It is independent of the angular velocity.(B) \\\\(I =mk^{2}\\\\)\\\\(k=\\sqrt{\\dfrac{T}{m}} (k=\\\\)radius of gyration)\\\\(I_{dist}=\\dfrac{mR^{2}}{2}\\\\)\\\\(k=\\dfrac{R}{\\sqrt{2}}\\\\)and Radius of the metallic disc is dependent on the temperature, because\\\\(A=A_{0}(1+B\\Delta T)\\\\) (Equation of thermal expansion)\\\\(\\pi r^{2}=\\pi R_{0}^{2}(1+B\\Delta T)\\\\)\\\\(r=R_{0}\\sqrt{1+B\\Delta T}\\\\)