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March 29, 2017

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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 - ,

    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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