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0,00068 = 1 × 0,000017 × (t2-23)
0,00068÷0,000017= t2-23
40=t2-23
t2=63
Lo= 100 cm
ΔL= 0,00068 m = 0,068 cm
t₁= 23 °C
α= 0,000017 /°C
Dit:
t₂=..?
Penye:
t₂= Δt+t₁
Δt= ΔL/(Lo.α)
Δt= 0,068/(100×0,000017)
Δt= 0,068/0,0017
Δt= 40 °C
t₂= 40+23
t₂= 63 °C