physics
posted by Ericahelp! .
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?

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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