Question

what do you understand by the thermal expansion of a substance

Answer 1

HELLO FRND . .
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THERMAL EXPANSION.
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Thermal expansion is the tendency of matter to change in volume in response to a change in temperature.

here seen the example of this is the buckling of railroad track, as seen in.

For example, in a solid atom and molecules revolve around its equilibrium point.

This type of stimulation is called thermal motion when a substance is heated, then its constituent particles begin to move forward, thus maintaining more average separation with their neighbors.

The amount of detail divided by temperature changes is called coefficient of material of thermal expansion; It usually varies with temperature.

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@SRK6