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Lt = panjang benda pada suhu t °C
L₀ = panjang benda pada suhu 0°C
α = koefisien muai panjang (/°C)
Δt = kenaikan suhu (°C)
Dik :
L₀ = 10 m
α = 0,0000 12/°C
Δt = 100°C - 25°C = 75°C
Dit : Lt?
Jb :
Lt = L₀ (1 + α . Δt)
Lt = 10 m (1 + 0,000012/°C . 75°C
Lt = 10 m (1 + 0,0009)
Lt = 10 m . 1,0009
Lt = 10,009 m