(Solved): Jse the worked example above to help you solve this problem. (a) A steel railroad track has a leng ...

Jse the worked example above to help you solve this problem. (a) A steel railroad track has a length of \( 30.800 \mathrm{~m} \) when the temperature is \( 0^{\circ} \mathrm{C} \). What is its change in length on a hot day when the temperature is \( 35.5^{\circ} \mathrm{C} \) ? (Enter your answer to the closest \( 0.001 \) m.) \[ \mathrm{m} \] (b) Suppose the track is nailed down so that it can't expand. What stress results in the track due to the temperature change? \[ \mathrm{Pa} \]