A thin rod having length L_0 at 0 °C and coefficient of linear expansion α has its two ends maintained at temperatures  θ_1 and  θ_2, respectively. Find its new length.

Q: A thin rod having length L₀ at 0 °C and coefficient of linear expansion α has its two ends maintained at temperatures  θ₁ and  θ₂ , respectively. Find its new length.