Using the concept of thermal expansion, explain the following things:
1. Railway tracks in summer
2. Rise in the level of mercury in a thermometer
3. Gaps left between the walls of building
1. Railway tracks in summer
2. Rise in the level of mercury in a thermometer
3. Gaps left between the walls of building
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Answer:
1. Rails are made from steel, they expand as they get hotter, and can start to curve this is known as 'buckling'.
2. When it comes into contact with a hot object, it's level in the capillary rises.
3. Gaps may be provided to: respect individual property line limits. allow room for maintenance on structure exteriors. provide for differential vertical settlement between two free-standing structures.
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