[QUE/TH-01002] TH-PROBLEM

A bimetallic strip of total thickness $x$ is straight at temperature $T$. What is the radius of curvature of the strip,
$R$, when it is heated to temperature $T + ∆T$ ? The coefficients of linear expansion of the two metals are $α_1$ and $α_2$ ,
respectively, with \(α_1 > α_2 \). Assume each metal has thickness \(x/2\), and that \(x << R.\)