Use the worked example above to help you solve this problem. (a) A steel railroad track has a length of 30.200 m when the temperature is OC. What is its change in length on a hot day when the temperature is 36.50C? (Enter your answer to the closest 0.001 m. ) 0.012 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? 8.03e7 Pa EXERCISE HINTS: GETTING STARTED | I'M STUCK! Use the values from PRACTICE IT to help you work this exercise. What is the length of the same railroad track on a cold winter day when the temperature is 5OF? m Need Help? Read It Submit