Question

The Eiffel Tower in Paris is 324 meters tall, and is made primarily of iron, which has a coefficient of linear expansion of 12 x 10-6. The average low in Paris is 1.00°C and the average high is 24°C. What is average change in height the tower experiences each year?

Answer 1

$$\Delta L=\alpha L\Delta T,$$ $$\Delta L=12\times10^{-6}\ ^{\circ}C^{-1}\times324\ m\times23C^{\circ}=0.089\ m.$$