1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook