Question

In a railway track two rails rejoined end to end with a gap in between them because

Answer 1

Answer:

in order to move the train

Answer 2

Answer:

The volume of materials changes depending on current temperature. Usually heat makes them expand, and cold leads them to contract. There have to be gaps to avoid strain on the tracks. The same applies in many other fields of engineering, i.e. bridge building.

Explanation:

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