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Homework Help: Temperature vs. Resistance

  1. Jul 1, 2007 #1
    1. The problem statement, all variables and given/known data

    At 30±C, the resistance of a segment of gold wire is 79 ohms*.
    When the wire is placed in a liquid bath,
    the resistance increases to 165 *ohms.
    The temperature coefficient is 0.0034/C at 20 degrees Celcius.
    What is the temperature of the bath? An-
    swer in units of C.

    2. Relevant equations

    Resistance = R(initial)[1+ alpha (T(final) - T(initial)]

    3. The attempt at a solution

    165 = 79 * ( 1 + .0034 * (T_final - 30) )

    T_final = 350.1787

    I'm submitting this and it's saying I'm wrong. Is the homework service in error?
  2. jcsd
  3. Jul 1, 2007 #2


    User Avatar
    Staff Emeritus
    Science Advisor

    The relevant equation is correct.

    The answer is correct for the given inputs.
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