Respostas

2014-06-10T14:09:59-03:00
ΔL = L0 × α × ΔΘ
:
ΔΘ = 50 - 20 = 30
:
ΔL = 10 × (12*10^ -6)× 30
:
ΔL = 36 × 10^-4
:
Comprimento Total = 10 + (36*10^ -4) metros
:
ou 10,0036\ metros
: