Jawabanmu

2014-03-25T21:00:50+07:00
Alfa=delta L/Aoxdelta T =0,457/0,75x50 =0,457/37,5 =0,012187
2014-03-25T21:11:53+07:00
Diketahui: L₀ = 0,75457 m², T₀= 100°C, T₂ = 50°C, ΔT= T₀-T₁=50°C, L₂ = 0.75 m²
ditanya: α.....?
jawab:  L₂ = L₀(1+α.ΔT)
            0,75 = 0,754579(1+α.50)
           0.75 = 0.754579 + 37,7285α
           α = 37,7285/ (0,754579-0,75) = 1,2.10⁻⁴
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