← 1.4 Temperature and Thermal Expansion
Area expansion of solids
Physics · Grade 10 · about 40 minutes
A sheet grows in two directions at once, so its area - and any hole in it - increases by about 2α A₀ ΔT.
Sign in to read this lesson
Lessons are for learners and teachers with an account. Browsing the curriculum — subjects, strands and what each sub-strand covers — stays open to everyone.
- 9 sections of explanation, worked examples and diagrams
- 1 practice task with hints and worked answers
- A quiz that marks itself as you go
- Your progress kept across every subject you take
Other lessons in this sub-strand
- Temperature and how we measure it
- Thermal expansion and where it matters
- How a liquid-in-glass thermometer works
- The Celsius and kelvin scales
- Thermocouples, probes and infrared
- Linear expansion and railway gaps
- Area expansion of solids
- Volume expansion and water tanks
- Bimetallic strips and thermostats
- Thermal expansion around Kenya