Small gaps are left between railway lines becauseWe cannot have rails of very long length-It allows for expansion of rails during summer-It allows for contraction of rails during summer-Both -ii- and -iii-

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Standard VIII

Physics

Linear Expansion

Small gaps ar...

Question

Small gaps are left between railway lines because

We cannot have rails of very long length.

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It allows for expansion of rails during summer.

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It allows for contraction of rails during summer.

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Both (ii) and (iii).

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Why small gaps are left between railway lines?

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Q. Assertion :While laying railway tracks, a small gap is left between adjacent rails.The iron rails expand in summer, and the gap allows space for the expansion. Reason: Because substance show contraction on heating and expansion on cooling

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