Jawabanmu

2014-04-07T20:45:07+07:00
Diketahui
Lo = 5 mm
Δt = 30°C-10°C=20°C
α  = 0,000017/°C
L = Lo x (1+αxΔt)
   = 5 x (1+0,000017x20)
   = 5 x (1,000017x20)
   = 5 x 20,00034
   = 100,0017 mm = 1,7 mm
2014-04-07T21:09:04+07:00
Alfa = 0,000017/K = 0,000017/°C
Δt = t1-t0= 30°-10°=20°
L₀ = 5,00 mm
L₁ = ?

L₁=L₀×(1+α×Δt)
L₁=5,00mm×(1+17×10⁻⁶×20°)
L₁=5,00mm×1,00034
L₁=5,0017

gatau bener gatau salah :)