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Lt-Lo/Lo. α = ΔT
(20,018 -20) / (20. 0,000009 )=ΔT
ΔT = 0,018 / 0,00018 = 100 °C
ΔT = T2-T1
T2 = ΔT+T1 = 100 +18 = 118 °C
t1 = 18 cm
Lo = 20 cm
α = 0,000009 /'C
Lt = 20,018 cm
Ditanya: t2 = .....?
jawab:
ΔL = Lt - Lo
ΔL = 20,018 - 20
ΔL = 0,018 cm
ΔL = Lo α Δt
0,018 = 20 x 0,000009 Δt
0,018 = 0,00018 Δt
Δt = 0,018/0,00018
Δt = 100'C
Δt = t2 - t1
100 = t2 - 18
t2 = 100 + 18
t2 = 118'C
panjangnya menjadi 20,018 cm ketika dipanaskan pada suhu 118 'C