Δl = α·l·ΔΤ
Δl = 3·10^(-5)k^(-1)/m·10m·10k°=0.003 m = 3 mm
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Δl = 1.5·10^(-2) m
l = 10 m
α = 3·10^(-5)k^(-1)/m
ΔΤ = Δl/(α·l)
ΔΤ = 1.5·10^(-2)/(3·10^(-5)·10) = 50°K
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