(a)A steel railroad track has a length of 30.0 m when the temperature is 0F. What...

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(a)A steel railroad track has a length of 30.0 m when the temperature is 0°F. What is its length on a hot day when the temperature is 40.0°F? (b) Suppose the track is nailed down so that it can't expand. What stress results in the track due to the temperature change? a) 0.018 m b) 2.20 x 10^8 Pa a) 0.018 m b) 3.20 x 10^8 Pa a) 0.026 m b) 1.20 x 10^8 Pa a) 0.018 m b) 1.20 x 10^8 Pa (a)A steel railroad track has a length of 30.0 m when the temperature is 0°F. What is its length on a hot day when the temperature is 40.0°F? (b) Suppose the track is nailed down so that it can't expand. What stress results in the track due to the temperature change? a) 0.018 m b) 2.20 x 10^8 Pa a) 0.018 m b) 3.20 x 10^8 Pa a) 0.026 m b) 1.20 x 10^8 Pa a) 0.018 m b) 1.20 x 10^8 Pa