What is the length of an aluminum rod at 65°C if its length at 15°C is 1.2 meters?

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Answer 1 · 2017-07-20T05:46:51

The length is $=1.20144m$

The coefficient of linear expansion of aluminium is

$alpha=24*10^-6 (ºC)^-1$

Therefore

$DeltaL=alphaLDeltaT$

$=24*10^-6*1.2*(65-15)$

$=1440*10^-6m$

$=1.44*10^-3$

The length is

$L+DeltaL=1.2+0.00144=1.20144m$