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ΔL = 72,06 - 72
ΔL = 0,06
ΔL = L₀ × α × ΔT
0,06 = 72 × α × 75
0,06 = α
72 × 75
0,000011 = α
Lo= 72 cm.
Δt=75 derajat celcius
α= ΔL: Lo×Δt
= 0,6 cm: (72cm×75 derajat celcius)
=0,6 cm: 5400= 0,000011