Physics

Problem

An aluminium rod is

50\,\text{cm}

long at

25^{\circ}\text{C}

. It becomes

0.090\,\text{cm}

longer when its temperature is raised to

225^{\circ}\text{C}

. Determine the coefficient of linear expansion of aluminium for this range of temperature. Express your answer in

\text{K}^{-1}