Question

Example:

A steel railroad track has a length of 30.000 m when the temperature is 0°C. What is its length on

a hot day when the temperature is 40.0°C? (b) Suppose the track is nailed down so that it

can’t expand. What stress results in the track due to the temperature change

Answer 1

$l=l_0(1+\alpha\Delta t)=30.018~m.$