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Nadya [2.5K]
3 years ago
7

Why the gaps left between succesive rails on a railway tracks​

Physics
1 answer:
Xelga [282]3 years ago
7 0

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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c. Moon A is four times as massive as moon B

Explanation:

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