Question

A rod 3 m long is found to have expanded 0.091 cm in length after a temperature rise of 60 deg C. What is the temperature coefficient for the material of the rod?

Answer 1

Write the equation that determines the amount of thermal expansion:

$$L_e=L_0(1+\alpha T),\\\space\\ \alpha=\frac 1T\bigg(\frac{L_e}{L_0}-1\bigg)=5.06·10^{-6}1/°\text{C}$$