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 9
A brass rod of length 1.5 m is heated from 25°C to 75°C. If the coefficient of linear expansion is 19 × 10⁻⁶ °C⁻¹, calculate the increase in length.
A liquid thermometer uses mercury. Why is mercury preferred over water for this purpose?
A steel bridge is 100 m long at 10°C. If the coefficient of linear expansion is 12 × 10⁻⁶ °C⁻¹, what will be the increase in length at 40°C?
Describe one practical application of thermal expansion in everyday life.
Describe what happens to the volume of a gas if it is heated at constant pressure.
Explain why a glass bottle filled to the brim with liquid may overflow when heated.
Explain why gaps are left between sections of railway tracks.
Explain why glassware can crack if hot water is poured into it suddenly.
Explain why telephone wires are left loose between poles.
If a metal rod of length 2 m expands by 0.002 m when heated from 20°C to 120°C, what is its coefficient of linear expansion?
If the original length of a rod is 3 m and it expands by 0.003 m for a temperature rise of 100°C, what is its coefficient of linear expansion?
Name the three types of thermal expansion in solids.
State one disadvantage of thermal expansion in construction.
State the formula for linear expansion of a solid.
What is meant by the term 'anomalous expansion of water'?
What is the main reason for using expansion joints in concrete roads?
What is thermal expansion?
