How does a metal rod expand? #physics #science

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A metal rod AB is bent into the shape shown. If the rod is heated uniformly, the space between...
the ends will (A) Increase (B) Decrease (C) Stay the same?

An example of how engineers need to take into account thermal expansion (and contraction) is railway design. Rail expansion occurs when temperature increases in the summer. This can cause joints to extrude and bulge. Therefore, expansion space is built into the system.

#physics #science
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Занимательная физика
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