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A bimetallic coil from a thermometer reacts to the heat from a lighter, by uncoiling and then coiling back up when the lighter is removed.

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Expansion joint in a road bridge used to avoid damage from thermal expansion.

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Thermal expansion of long continuous sections of rail tracks is the driving force for rail buckling. This phenomenon resulted in 190 train derailments during 1998–2002 in the US alone.

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Follow us at: https://plus.google.com/+tutorvista/ Check us out at http://physics.tutorvista.com/heat.html Thermal Expansion The thermal expansion is the expansion taking place in gases when the temperature is increased. Take balloon and fill gas then start heating then the balloon become larger. This gives a very good illustration of thermal expansion.