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Thanks again Bob, but how do you solve for h?
Thank you for this, Bob. Can you give me a reference for the second question, and I am not sure about "F".
2nd order differential equation
Find the analytic solution for this equation in terms of two constants by integrating twice.
d/dx(h * dh/dx) = 0
h(0) = 40 ; h(10000) = 40
d²h/dx² = -R/K = 2 x 10-5
h(0) = 1000 ; h(10000) = 1000
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