Railroad tracks are made from segments l = 79 m long at t = 20° c. when the tracks are laid, the engineers leave gaps of width l between adjacent segments to allow for thermal expansion. the coefficient of linear expansion is α = 12 × 10-6 °c-1 and engineers design the tracks to withstand temperatures of tc = 39.5 degrees.
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Railroad tracks are made from segments l = 79 m long at t = 20° c. when the tracks are laid, the eng...
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