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ΔT = 100derajatC - 0derajatC = 100derajatC
Δl = 200,24cm - 200cm = 0,24cm
Ditanyakan : α besi
Jawab : α = Δl ÷ (ΔT × lo)
= 0,24 ÷ (100 × 200)
= 0,24 ÷ 20000
= 0,000012/derajatC