Posted by **Erica--help!** on Monday, November 8, 2010 at 9:20am.

An aluminum rod is 21.5 cm long at 20°C and has a mass of 350 g. If 12500 J of energy is added to the rod by heat, what is the change in length of the rod?

- physics -
**bobpursley**, Monday, November 8, 2010 at 9:33am
first find the change in temp

heat=mass*specificHeat*deltaTemp

look up specificheat for al, compute delta temp

then, go to linear expansion.

deltaLength= Length*coefflinearexpansion*deltaTemp

look up the linear expansion coeff, compute change in length.

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