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What happens to metal railroad tracks during the heat of a summer day?

What happens to metal railroad tracks during the heat of a summer day?
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3 votes
What happens to metal railroad tracks during the heat of a summer day?

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User Mosammat
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2 Answers

5 votes
The rails expand during the heat of a summer day
answered
User Jolestar
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8.8k points
3 votes
They expand and that is why there are small gaps
answered
User SteveFerg
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8.2k points
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