The length of each steel rail is 10m in winter. The coefficient of linear expansion of steel is 0.000012/°C and the temperature increases by 15°C in summer. The gap to be left between the rails
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The length of each steel rail is 10m in winter. The coefficient of linear expansion of steel is 0.000012/°C and the temperature increases by 15°C in summer. The gap to be left between the rails