Soal:
Jawaban:
Α besi = 0,000025
β besi = 0,000025 × 2 = 0,00005
β besi = 0,000025 × 2 = 0,00005
ΔA = A₀ × β × ΔT
ΔA = ( 2 × 1,5 ) × 0,00005 × 50
ΔA = 3 × 0,00005 × 50
ΔA = 0,0075 m²
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