Question
A 2 m rod expands by 0.002 m for a 50°C rise. What is its linear expansion coefficient?
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Correct Answer: C. 2 × 10^-5 °C^-1
Explanation:
Use α=ΔL/(LΔT).
α=0.002/(2×50)=2×10^-5 °C^-1.
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