Physics, asked by Luckshitha, 9 months ago

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Answered by avinash993650
2

Answer:

sorry but please post the question properly

Answered by calli321
1

Answer:

This is for the contraction and expansion. During the summer the rail expand and during the winter it contracts.

Small gaps which function as expansion joints are deliberately left between the rail ends to allow for expansion of the rails in hot weather. ... Because of these small gaps, when trains pass over jointed tracks they make a "clickety-clack" sound.

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