Physics › Section I · Temperature, gases, and heat › Topic I.1
Temperature and thermal expansion
Temperature tells you which way energy will flow between two objects, and changing it makes almost everything grow or shrink a little. This topic sets up the temperature scales and the zeroth law, then the rules for thermal expansion that keep railways and bridges safe.
In this topic
- What a thermometer measures
- The zeroth law and three scales
- Worked example: a weather report
- Absolute zero
- Linear thermal expansion
- Worked example: a summer rail
- Areas, holes and volumes
- Worked example: a brimming flask
- Water's odd behaviour
- Thermal stress
- Common mistakes to avoid
- Key takeaways
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