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ditanya : α =...?
jawab : α = L - L₀ / L₀ · Δt
= 100,072 -100 / 100 · 80
= 0,072/8000
= 0,000009/°C ⇒ 9 × 10⁻⁶ /°C
maaf jika ada kesalahan
semoga membantu