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Questions tagged [physics]

Questions related to the application of Mathematica to problems in physics.

954 questions
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How to calculate position from 3 dimensional acceleration data?

I discussed this problem yesterday with Pickett here. We concluded that the best solution may be just Interpolate and then NIntegrate to get the position vector. I also suggested smoothing but as Pickett commented you can lose important details with…
hhh
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Physics based Mathematica project ideas?

I am looking to make a physics based Mathematica project. Ideally the project would take around 12 hours, gathering any experimental data and analyse the findings. I'd have full access to university physics labs. The project would be for 2nd year…
user12800
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1 answer

How to determine the direction angle of a point relative to the principal direction in the three-dimensional Mohr's circle

The three-dimensional stress state of a point in the solid after rotation is as follows: EulerMatrix[{α,β,γ}]\[Transpose].{{10, 0, 0}, {0, 20, 0}, {0, 0, 25}}.EulerMatrix[{α,β,γ}] The three-dimensional Mohr circle represented by this state…
A little mouse on the pampas
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Calculating the normalization constant for a wavefunction

How can I compute the normalization constant for a quantum mechanics wave-function, like $\Psi(x) = N \exp(-\lambda x^2/2)$ by using Mathematica? (The normalization constant is $N$).
infiniteNOP
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Slater Koster parameters generated using Mathematica

Here is a link where people describe how one can generate the entries of the Slater Koster parameter table seen here as Table of interatomic matrix elements. The authors mention Mathematica packages one can use to generate these table entries,…
NOhs
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Problem simulating a wave on a string by solving the wave equation as a difference equation.

This is a question I posted earlier however the purpose of what I'm doing is going to be expounded much more clearly. yy[x_, t_] := Which[x == 0, yy[0, t] = 0, x == 1, yy[1, t] = 0, t == 0, yy[x, 0] = Exp[-1000 (x - .3)^2]] This code is the…
Daniel Berkowitz
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How can I obtain the closed-form description of the particle path? (If possible...)

With respect to the following image , the rollercoaster track between points A and A' is such so that the centripetal force is constant, corresponding to its initial value at point A: an=v0^2/r0, where r0 is the radius of the initial curvature and…
achar
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Calculating commutators in quantum mechanics symbolically with the help of Mathematica

Say I have a hamiltonian $H=p_x^2+p_y^2+x^2+y^2+x^4+y^4$, and I want to calculate the commutator $\left[A,B\right] \equiv AB-BA$ of arbitrary operators $\mathcal{O}=x^ap_x^by^cp_y^d$, where $a,b,c,d\in\mathbb{N}$, subject to 2 simple…
ghost
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Visualisation of equipotential surface - linear charge

I am completely new in Mathematica "programming" language. At the university in Electrodynamics, we have gotten a homework to visualise the equipotential surfaces with function ContourPlot3D. I have been able to get the matematical expression for…
Andrew
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Iterative solution for particle in magnetic field

I have some questions relating movement of a particle calculating with mathematica. A particle (mass: m, charge: q) moves on x-axis from left with speed $v_0$ to a magnetic field $\vec{B} = (0,0,B)$. Entry is at $\vec{r}(t=0)=(0,0,0)$. How would…
TomKerr
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Cutting off some terms from a matrix

I'm working with perturbation in differential geometry. I got a huge matrix for Christoffel symbol, and I need to simplify it using the consideration that $\phi^2$, $\psi^2$, $\phi\partial_{\mu}\phi$,…
Kamog
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Non elastic collision?

I am new here and still learning Mathematica in order to make use of it in my studies (physics). I am encountering one "issue". I wish to include non - elastic collision in simulation below: When particle's path intercepts condenser's plate, it…
Vratovi Zvezda
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What is the meaning of the highlighted expression ?

I am using GRQUICK package for calculation of Ricci tensors. I am using a non diagonal metric with coefficients being functions of two co-ordinates. I want to know if the highlighted expression denotes partial derivates or something entirely…
Astronomer
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Simpler way to compute gravity?

I have code for a simple n-body problem: GravityForce[pos1_, pos2_] := (pos1 - pos2)/ EuclideanDistance[pos1, pos2]^2; GravityForce[p_, p_] := {0, 0, 0}; Forces[pos_List] := With[{n = Length[pos]}, Mean /@ Table[GravityForce[pos[[i]],…
user5601
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About using series function

I am using Series function on (1/z)(-k^2)^z. Up to z^0, the function gives me 1/z + Log[-k^2]. But in the standard textbook on QFT, it turns out the expansion should give 1/z + Log[k^2/mu^2] -i*pi up to z^0 in the series. Could you explain the…
NovoGrav
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