What is the change in volume of a metal rod when its temperature increases by $\Delta T$, given that

Question

What is the change in volume of a metal rod when its temperature increases by $\Delta T$, given that the coefficient of linear expansion of the metal is $\alpha$.

Professor PC Thomas Classes · Answer

Volume expansion coefficient $\gamma \approx 3\alpha$. Fractional change in volume is $3\alpha \Delta T$.