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 8
A bimetallic strip is made of two metals with different coefficients of expansion. When heated, what happens to the strip?
A brass rod and an iron rod of equal length are heated by the same amount. If brass has a higher coefficient of expansion, which rod will be longer after heating?
A liquid has a coefficient of volumetric expansion of 0.0012 /°C. If 1000 cm³ of the liquid is heated from 20°C to 60°C, what is the increase in volume?
A metal ball just passes through a ring at room temperature. What happens if the ball is heated?
A railway track is 100 m long at 10°C. If the coefficient of linear expansion is 11 × 10⁻⁶ /°C, what will be its length at 40°C?
A steel rod of length 2 m is heated from 20°C to 70°C. If the coefficient of linear expansion is 12 × 10⁻⁶ /°C, what is the increase in length?
Describe what happens to the volume of air in a balloon if it is heated.
Explain why a tightly closed metal lid on a glass jar can be opened more easily by running it under hot water.
Explain why glass may crack when hot water is poured into it suddenly.
If a glass bottle is filled to the brim with water and both are heated, what is likely to happen?
If a solid expands by 0.5% when heated by 100°C, what is its average coefficient of linear expansion?
Name the three types of thermal expansion.
State one practical use of thermal expansion in everyday life.
The coefficient of linear expansion of aluminum is higher than that of iron. If both are heated equally, which will expand more?
The formula for linear expansion is ΔL = αL₀ΔT. What does α represent?
The formula for volumetric expansion is ΔV = βV₀ΔT. What does β represent?
What is the main reason for leaving a small gap between tiles on the floor?
What is thermal expansion?
Which property of matter is responsible for thermal expansion?
Why are gaps left between sections of railway tracks?
