this is my worksheet: https://cocalc.com/share/f7766c5e-2f4...
In line 47 I solve for d_k. However the result does not contain p_ges nor U. That does not make sense to me, and makes me suspicious towards the result. What could have caused that? This equation describes a physical phenomenon, and it would not make sense for d_k to be independent of U or p_ges.
You have two definitions (with the = sign) of p_ges. One of them is the symbol
p_ges = var('p_ges', latex_name=r'\varphi_{ges}')
and the other one is the right-hand side of some equation p_ges == p_1 + p_2 + p_3 + p_4.
You should probably give this right-hand side a different name, e.g.
p_ges_rhs = p_1 + p_2 + p_3 + p_4
Then the equation you want to solve is
d = solve(p_ges == p_ges_rhs, d_k)
Your old line 47 is equivalent to
d = solve(p_ges_rhs == 0, d_k)
which explains why p_ges doesn't appear (it is implicitly set to zero).
Asked: 2019-02-13 22:14:41 +0100
Seen: 175 times
Last updated: Feb 13 '19
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