PHYSICAClass 11 Physics simulations · Thermal Properties of Matter
Thermal expansion
Heat a metal rod and measure the small increase in its length.
What to notice
The diagram magnifies the change in length so that it is easy to see.
Key relation
ΔL = αL₀ΔT
Try this
Double the original length. What happens to the expansion?
What you can change
- Final temperature: 20 to 220 °C
- Original length: 0.5 to 3 m
- Expansion coefficient: 8 to 30 µ/K
More in Thermal Properties of Matter
- Bimetallic strip
- Mixing hot and cold water
- Steady heat conduction
- Heating curve: ice to steam
- Newton’s law of cooling
- Heating with specific heat
- Net thermal radiation
- Anomalous expansion of water
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