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Q: I only need answer please! help! ( Answered 5 out of 5 stars,   0 Comments )
Subject: I only need answer please! help!
Category: Reference, Education and News > Education
Asked by: wyzgowski7-ga
List Price: $2.00
Posted: 24 May 2005 10:46 PDT
Expires: 23 Jun 2005 10:46 PDT
Question ID: 525067
What is the length of an aluminum rod at 65 C if it's length at 15 C is 1.2 meters?
Subject: Re: I only need answer please! help!
Answered By: welte-ga on 24 May 2005 19:25 PDT
Rated:5 out of 5 stars

The thermal expansion coefficient for Aluminum is 2.31 x 10^-5,
referred to as alpha (or a below).

The formula for linear expansion of solids is
\delta L = aL\delta T
   = 2.31 x 10^-5 * 1.2m * (65C-15C)

This is the amount by which the length increases, which is very small
compared to 1.2 meters.  The new length would be 1.201386m

Here's a description of a lab on thermal expansion, with equations:

Here's a page about Aluminum, along with physical constants:

Here is a page describing thermal expansion:

wyzgowski7-ga rated this answer:5 out of 5 stars and gave an additional tip of: $10.00
Thank you very much you were very helpful, I am very grateful!!!!

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