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Klaus6523
@Klaus6523
January 2020
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Uma barra de alumínio passando de 15ºC a 100ºC alonga-se 1,224 m. Calcule o
comprimento inicial dessa barra. Dado:
-6 -1
ªAL=24.10 ºC
.
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1,24 m = 1240 mm
ΔL = Lo . α . Δt
1 240 = Lo . 24.10^-6 . ( 100 - 15 )
1 240 = Lo . 0,000024 . 85
1 240 = Lo . 0,00204
Lo = 1240 / 0,00204
Lo = 607843,13 mm
607843,13/1000
≈ 607,84 m
ok
1 votes
Thanks 3
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Lista de comentários
ΔL = Lo . α . Δt
1 240 = Lo . 24.10^-6 . ( 100 - 15 )
1 240 = Lo . 0,000024 . 85
1 240 = Lo . 0,00204
Lo = 1240 / 0,00204
Lo = 607843,13 mm
607843,13/1000 ≈ 607,84 m ok