In The book "Handbook of Nuclear Engineering" by Dan Cauci, the following passage is shown on page 458.
What does he mean "integrate along the curve?" As in a line integral? What do I do with the dy and dx?
In The book "Handbook of Nuclear Engineering" by Dan Cauci, the following passage is shown on page 458.
What does he mean "integrate along the curve?" As in a line integral? What do I do with the dy and dx?
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It is a parametrisation: $x(s)$ is the $x$-position given $s$ and vice versa. It is fairly common to do this. See for instance http://tutorial.math.lamar.edu/Classes/CalcIII/LineIntegralsPtI.aspx