Respostas

2014-08-03T19:37:31-03:00
ΔL =α L₀ ΔT

ΔT = 50ºC
ΔL = 50cm     
L₀ = 100cm

α = ΔL / (L₀ΔT)
α = 50 / (100*50)
α = 0,01