9.2.4 - Area Expansion
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Practice Questions
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What is area expansion?
💡 Hint: Think about what happens when materials are heated.
What does the coefficient of area expansion indicate?
💡 Hint: Remember the definition of the coefficient in relation to temperature.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the primary consequence of thermal expansion in solids?
💡 Hint: Consider the effects of heating.
True or False: Area expansion is characterized by the formula ΔA = 2αA0ΔT.
💡 Hint: Recall the formula we've discussed.
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Challenge Problems
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A circular metal disc with an original area of 5 m² is heated from 15°C to 90°C. The coefficient of area expansion is 1.1 × 10^−5 °C⁻¹. Calculate the change in area and the new area.
💡 Hint: Ensure to follow each step in the calculation carefully.
Explain how area expansion can affect the surface of a roadway during hot weather, produce an example of structural failure.
💡 Hint: Think about how structures interact with temperature changes.
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