Recent content by Irene Kaminkowa
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Graduate Analytical Integration of a Difficult Function
Sure, since the expression under the root becomes negative- Irene Kaminkowa
- Post #6
- Forum: Calculus
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Energy density between charged parallel plates
My answer is 5.085⋅105 J/m3? Regards to your teacher )- Irene Kaminkowa
- Post #11
- Forum: Engineering and Comp Sci Homework Help
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Energy density between charged parallel plates
But have it in your mind. Derive the final formula.- Irene Kaminkowa
- Post #9
- Forum: Engineering and Comp Sci Homework Help
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Energy density between charged parallel plates
Energy density is ω = W / V = E / (Ad) where W - energy, V - volume, d - distance between the plates. Capacity of the system (actually, we consider a capacitor) C = ε0A/d Energy W = Q2/2С Hope, it is enough to find the solution.- Irene Kaminkowa
- Post #7
- Forum: Engineering and Comp Sci Homework Help
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Energy density between charged parallel plates
What is the distance between plates?- Irene Kaminkowa
- Post #6
- Forum: Engineering and Comp Sci Homework Help
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Finding All Pairs of Positive Integers for (22016+ 5)m + 22015 = 2n + 1
Speaking about ends 22016 ends with 6 22015 ends with 8 Thus (22016 + 5)m + 22015 ends with 9 n = 4k + 3- Irene Kaminkowa
- Post #16
- Forum: Precalculus Mathematics Homework Help
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How to integrate csc 2x
Another way $$ \int \frac{dx}{sin(2x)} = \int \frac{dx}{2sinx~cosx} = \int \frac{dx}{2cos^2 x~tanx} = \begin{bmatrix} t = tan x\\ dt = \frac{dx}{cos^2x} \end{bmatrix} = \frac{1}{2}\int \frac{dt}{t}= \frac{1}{2}ln|t| + C = \frac{1}{2}ln|tan x| + C $$- Irene Kaminkowa
- Post #20
- Forum: Calculus and Beyond Homework Help
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Graduate Why Are The Units of Coulombs Law What They Are?
Actually, it is: https://en.wikipedia.org/wiki/Inverse-square_law- Irene Kaminkowa
- Post #6
- Forum: Electromagnetism
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MATLAB Calculating second derivative of curve from data in Matlab
anahita, you can siply use finite differencies: https://en.wikipedia.org/wiki/Finite_difference- Irene Kaminkowa
- Post #5
- Forum: MATLAB, Maple, Mathematica, LaTeX
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Could holograms and quantum mechanics make Star Trek holodecks real?
Data failed to replicate himself in his daughter, who became "unstable". His brother was an "evil twin", kind of "unstable" either. Thus, humans are the only rational choice. Not being too smart, you won't be too dangerous )- Irene Kaminkowa
- Post #25
- Forum: Science Fiction and Fantasy Media
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Graduate Minimizing cost with nonlinear denominators in binary connection matrix
If N is not too big, you can find "brute force" numerical solution. The code is simple. No "conventional solver" is needed. Or, you can find Cij and then feed any solver with them.- Irene Kaminkowa
- Post #2
- Forum: Calculus
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Quadratic discriminant with tricky algebra
In the second equation there is a misprint The correct equation is (a+c-b)x2-2(a-c)x+(a+c+b) = 0 The proof is not difficult. Just find the discriminant.- Irene Kaminkowa
- Post #4
- Forum: Precalculus Mathematics Homework Help
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Dynamic Arrays (One, two, three dimensions)
According to the sacred book ;) dereferenced pointers are recommended instead of array substript, that is *(*(*(A + i) + j)+k) instead of A [i ][j ][k ] As for transformation of a 3D array into 1D, the rule is simple Assume d1,d2,d3 - dimensions Then A[i ][j ][k ] = A_line [k + d3⋅(j + d2⋅i)]- Irene Kaminkowa
- Post #23
- Forum: AI and Computer Science
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Solving a differential equation using integrating factor
Another approach dy/dx = 2x(y+1) dy/(y+1) = 2xdx y+1 = Cex2- Irene Kaminkowa
- Post #11
- Forum: Calculus and Beyond Homework Help
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C: remove recursively elements of a list
Is remLista for removal? Then, look at your pushBack. When do you use malloc? Free is the symmetric operation: you are to deallocate your node. Here you can find the thorough instructions both for recursive and iterative implementation: https://www.cs.bu.edu/teaching/c/linked-list/delete/- Irene Kaminkowa
- Post #4
- Forum: AI and Computer Science