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Li - Lo
_____
Lo ×ΔT
3,00091 - 3m
--------------------
3m ×60 derajat
= 0,00091
-------------
190
= 91
---------
18.000.000
= 0,000005
lt = 3,00091 meter
ΔT = 60°C
Dit : α = ?
lt = lo + lo . α . ΔT
3,00091 = 3 + 3 . α . 60
0,00091 = 180α
5,056 x 10^-6 = α