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Thermal Expansion of Solids

when should m...

Question

when should more space be left between two sides of a railway track in summers or in winter. Do explain why

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Solution

In summers.
The gaps are left between the rail ends to allow for expansion of the metal of the rails in hot weather without tearing up sections of tracks,

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Q. A railway track (made of iron) is laid in winter when the average temperature is

18^{\circ} C

. The track consists of sections of

12.0 m

placed one after the other. How much gap should be left between two such section so that there is no compression during summer when the maximum temperature goes to

48^{\circ} C

? Coefficient of linear expansion of iron

= {11 \times 10^{- 6}}^{\circ} C^{- 1}

Q. A railway track (made of iron) is laid in winter when the average temperature is 18°C. The track consists of sections of 12.0 m placed one after the other. How much gap should be left between two such sections, so that there is no compression during summer when the maximum temperature rises to 48°C? Coefficient of linear expansion of iron = 11 × 10^–6 °C^–1.

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Why is a gap left between the race in railway track

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