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 11
A brass disc has a diameter of 10 cm at 25°C. If the coefficient of linear expansion for brass is 2 × 10⁻⁵ /°C, what will be its diameter at 75°C?
A cube of side 5 cm is heated from 0°C to 100°C. If the coefficient of linear expansion is 1 × 10⁻⁵ /°C, calculate the increase in volume.
A glass container is filled with mercury at 0°C. Both are heated to 100°C. If the coefficient of volume expansion of mercury is greater than that of glass, what will happen?
A metal ball passes through a ring at 20°C but gets stuck at 80°C. Explain why.
A metal rod expands by 0.5 cm when heated from 30°C to 130°C. If its original length is 1 m, calculate the coefficient of linear expansion.
A steel rod of length 2 m is heated from 20°C to 120°C. If the coefficient of linear expansion for steel is 1.2 × 10⁻⁵ /°C, calculate the increase in length.
Describe how a bimetallic strip works in a thermostat.
Describe the difference between linear, area, and volume expansion.
Explain why gaps are left between sections of railway tracks.
Explain why telephone wires are kept loose between poles.
If a rod is heated and its length increases by 0.2%, what is the approximate temperature change if its coefficient of linear expansion is 2 × 10⁻⁵ /°C?
If the area of a metal sheet at 0°C is A₀, and its coefficient of area expansion is β, what is the formula for its area at temperature T?
State the formula for linear expansion of a solid rod.
Which property of matter is responsible for thermal expansion?
