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For a uniform bar, what commonly happens to its length as temperature rises?

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  1. It increases according to its expansion coefficient
  2. It stays the same until the metal melts
  3. It shrinks as the metal softens

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References

  1. NIST Solder Properties and Thermal Expansion www.metallurgy.nist.gov/mechanical_properties/solder_paper.html Checked 2026-10-10.

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