A 30 m segment of railroad track is clamped to the ground at both ends when the temperature outside is 0C by strong steel pins. Thermal expansion is α=10 x 10-6 /C, Young’s Modulus Y is 1011 Pa. The temperature is then increased by an amount ΔT. A. The pressure is Y B. The pressure is 0 C. The pressure depends on the cross-sectional area of the tracks D. The pressure is Yα ΔT E. The pressure is Y∆T Lo Lo+∆TL�
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