Answers

2015-05-13T23:00:09+05:30
The expansion of metals generally good conductors by heat conventional or radiant is known as thermal expansion 
eg. their are gaps left between railway tracks so they don't bend when the thermally expand
 
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  • Brainly User
2015-05-14T08:36:43+05:30
Thermal expansion occurs when an object expands and becomes larger due to a change in the object's temperature. To understand how this happens, we need to think about what temperature actually is. 
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