Thermal Expansion
Physics ⇒ Heat and Thermodynamics
Thermal Expansion starts at 7 and continues till grade 12.
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See sample questions for grade 7
A metal rod is 2 meters long at 20°C. If it expands by 0.002 meters when heated to 100°C, what is the change in length?
A steel rod of length 1 m expands by 1 mm when heated. What is the new length?
Describe one way thermal expansion is useful in everyday life.
Describe what happens to the volume of air in a balloon when it is heated.
Explain why a bimetallic strip bends when heated.
Explain why gaps are left between sections of railway tracks.
If a bridge is 100 meters long and expands by 0.01% in summer, how much does it expand?
Name one everyday example where thermal expansion is important.
The formula for linear expansion is ΔL = αL₀ΔT. What does α represent?
What happens to the density of a substance when it expands?
What is the main reason for expansion joints in concrete pavements?
What is thermal expansion?
Why do glass windows sometimes crack in winter?
Why do telephone wires appear to sag more in summer than in winter?
