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Je m'appelle
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Homework Statement
http://j.imagehost.org/0069/thermo.jpg
Homework Equations
The Attempt at a Solution
OK, so I tried to derive θ in respect to r as in θ(r):
[tex]\frac{d\theta}{dr} = \frac{-100}{(r - 1)^2}[/tex]
Then, I multiplied both sides of the equation by 'dr',
[tex]d\theta = \frac{-100}{(r - 1)^2}dr[/tex]
Then I divided both sides of the equation by θ in order to find the fractional error but it doesn't match with the equation on the picture:
[tex]\frac{d\theta}{\theta} = \frac{dr}{(1 - r)}[/tex]I'm lost.
Anyone?
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