Respostas

2014-03-25T11:00:11-03:00
Resposta

Lo = 40cm
Δt = 20ºC

Formula

ΔL = Lo.α.ΔT

ΔL = 40.15.10⁻⁶.20

ΔL = 12000.10⁻⁶

ΔL = 0,012cm
15 4 15