Practice Linear Expansion (9.2.1) - Thermal Expansion of Solids, Liquids, and Gases

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9 questions

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Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is the formula for linear expansion?
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Think about what each symbol in the formula represents.
Question 2.
If a solid's temperature increases, what happens to its length?
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Consider how heat affects materials.
3Question 3.
What does ΔL represent in the formula ΔL = αL₀ΔT?
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Think about the effect of temperature on a solid.
4Question 4.
True or False: Metals typically have a lower coefficient of linear expansion than plastics.
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Consider how materials respond to heat.
Question 5.
A copper wire of length 20 m is heated from 30°C to 100°C. The coefficient of linear expansion of copper is 16 × 10^-6 °C⁻¹. Calculate the new length of the wire.
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Don't forget to add the change in length to the original length.
Question 6.
A 10 m aluminum bar expands by 0.015 m when heated to 200°C. If the original temperature was 25°C, calculate its coefficient of linear expansion.
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Use the expansion formula to isolate and solve for α.

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