Respostas

2013-07-05T15:50:23-03:00
L = Lo.alfa. delta T
116.10³ = Lo.24.10-6.78
Lo=116.10³/ 1872.10-6
Lo= 0,061.10-3
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2013-07-05T16:05:00-03:00
Delta L = 0,116cm -> 0,00116 m
delta T = 98 -20 = 78°
alfa = 24.10-6/°C

L0 = delta L/ alfa.delta T
L0 = 0,00116 / 24.10-6 . 78
L0 = 0,6196 m -> 61,96 cm
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