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Posted by **sima** on Wednesday, April 4, 2012 at 8:32am.

I know the equation to be used is, delta length=(linear coefficient of expansion)(length)(delta temperature)

i am confused as to what to use for length on the right side of the equation, and what to subtract from delta length

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**bobpursley**, Wednesday, April 4, 2012 at 11:19amHmmm. Do it in two parts, steel expansion, and aluminum expansion, then add the two expansions.

- physics -
**Anonymous**, Wednesday, April 4, 2012 at 11:48amWhat do i use for delta length?

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**bobpursley**, Wednesday, April 4, 2012 at 12:34pmThat is what you are solving for.

deltaLengthAl= coeff*changetemp*lengthorigAl

deltaLengFe= coeff*changetemp*lenghorigFe

Total changelenght= sum of above

- physics -
**Anonymous**, Wednesday, April 4, 2012 at 2:34pmit didnt give me the correct answer

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