Respostas

2014-03-05T18:09:12-03:00
Resposta

ΔT = 80 - 15
ΔT = 65ºC
α = 25.10⁻⁶
Lo = 240cm

Formula

L = Lo.(1 + α.ΔT)
L = 240 . (1 +  25.10⁻⁶.65)
L = 240 . (1 + 1625.10⁻⁶)
L = 240 + 390000.10⁻⁶
L = 240 + 0,39
L = 240,39cm

20 4 20