Even though steel has a relatively low linear expansion coefficient (α steel = 13∙10–6 °C-1 ), the expansion of steel railroad tracks can potentially create significant problems on very hot summer days. To accommodate for the thermal expansion, a gap is left between consecutive sections of the track. If each section is 25.0 m long at 20.0 °C and the gap between sections is 10.0 mm wide, what is the highest temperature the tracks can take before the expansion creates compressive forces between sections?
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