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 36.5C? (Enter your answer to the closest 0.001 m.) 0.012 (b) Suppose the track is nailed down so that it can't expand. What stress results in the track due to the temperature change? 6.7e7 X Your response differs from the correct answer by more than 10%. Double check your calculations. 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