describe two applications of thermal expansion of solids, liquids and gases.
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The same happens in all liquids and gases, driving natural heat transfer upwards in homes, oceans, and weather systems. Solids also undergo thermal expansion. Railroad tracks and bridges, for example, have expansion joints to allow them to freely expand and contract with temperature changes.
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solids
-metal rims are heated before they are fitted to the wooden wheels of carts
-rails have little gaps between them as they expand linearly at hot days
liquids
-mercury expands in thermometers
-water expands when boiled/heated
gases
-hot air ballons
- launching of rockets
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