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Lo = 150cm
t1 = 0'c
t2 = 100'c
L = 150,375cm
Dit: α.........?
L = Lo (1+α(t2-t1))
150,375 = 150 (1+α(100-0))
150,375 = 150 (1+100α)
150,375 = 150 + 15000α
15000α = 150,375 - 150
15000α = 0,375
α = 0,375/15000
α = 0,000025/'c