Question

what is thermal expansion?​

Answer 1

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Thermal expansion is the tendency of matter to change its shape, area, volume, and density in response to a change in temperature, usually not including phase transitions. Temperature is a monotonic function of the average molecular kinetic energy of a substance.

Answer 2

The expansion of a substance on heating is called thermal expansion.

There are three types of thermal expansion:-

• linear expansion
• area expansion
• cubical expansion

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