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Text File  |  1992-09-02  |  299b  |  8 lines
  1. In physics, the increase in size of a
  2. constant mass of substance (a body) caused
  3. by, for example, increasing its temperature
  4. (thermal expansion) or its internal pressure.
  5. Expansivity, or coefficient of cubical (or
  6. thermal) expansion, is the expansion per unit
  7. volume per degree rise in temperature.
  8.