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lo = 60 m
to = 40°C
α = 12 × 10^(-6 ) /°C = 0,000012 /°C
lt = 60,0078 m
Ditanya
a. t= ?
b. Δt = ?
Pembahasan
Ingat rumus lt = lo( 1 + αΔt)
60,0078 = 60(1 + 0,000012Δt)
⇔60,0078 = 60+ 0,00072Δt
⇔60+ 0,00072Δt = 60,0078
⇔0,00072Δt = 60,0078 - 60
⇔0,00072Δt = 0,0078
⇔Δt = 0,0078/ 0,00072
⇔Δt = 780/ 72
⇔Δt = 780/ 72
⇔Δt = 10,83 °C
dan
t = to + Δt = 40 + 10,83 = 60,83 °C
Jawab
Suhu akhir adalah 60,83 °C
dan
kenaikan suhunya 10,83 °C
Selamat belajar !
terima kasih
@wello1
Nop 2016