Physics

Problem

A bimetallic strip is made by firmly bonding brass (coefficient of linear expansion

1.9\times10^{-5}\,\text{K}^{-1}

) to steel (coefficient

1.2\times10^{-5}\,\text{K}^{-1}

). When the strip is heated, which metal will be on the concave side of the bend? Give a brief reason.