Question

why material expands on heating​

Answer 1

Answer:

Because kinetic energy of that material use to get increase

Answer 2

Answer:

When a solid is heated, its atoms vibrate faster about their fixed points. The relative increase in the size of solids when heated is therefore small. Metal railway tracks have small gaps so that when the sun heats them, the tracks expand into these gaps and don’t buckle

Explanation:

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