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= 2 . (1,1 . 10⁻⁵)
= 2 . 0,000011
= 0,000022/°C
Ao = 6 m²
Δt = t₁ - to
= 100 - 28
= 72°C
Ditanyakan : a) ΔA
b) A₁
Penyelesaian : a) ΔA = β . Ao . Δt
= 0,000022 . 6 . 72
= 0,009504 m²
b) A₁ = Ao + ΔA
= 6 + 0,009504
= 6,009504 m²