(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

What is the fractional change in the resistnace of an iron filament when its temperature changes from 25.0 degrees Celsius to 50 degrees Celsius?

2. Relevant equations

R = R[tex]_{0}[/tex](1 + [tex]\alpha[/tex](T - T[tex]_{0}[/tex]))

3. The attempt at a solution

R = R[tex]_{}0[/tex](1+5x10^3x25)

R = 1.125R[tex]_{}0[/tex]

1.125R[tex]_{}0[/tex]/R = 1.125

The book's answer is 0.125, and i have 1.125, what did I do wrong?

Sorry; I can't figure out how to make the 0's in the R's go into subscript, not superscript. Those 0's are supposed be subscripted.

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# Homework Help: Resistance and temperature problem; answer does not agree with book

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