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Physics

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A wire 3.00 m long and .450 mm2 in cross-sectional area has a resistance of 41.0Ω at 20 degrees C. If its resistance increases to 41.4Ω at 29.0 C, what is the temperature coefficient of resistivity?

  • Physics -

    why are you posting under different names?


    changeresistane=tempcoeff*deltTemp
    .4=tempcoeff*9C

    solve for tempcoefficent

  • Physics -

    oh its a group of six friends working together and i didn't know they all posted it twice...sorry about that

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