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RSS Feed for Wolfram Community showing any discussions in tag Physics sorted by activeHow to determine the distance between atoms in a molecule in mathematica?
https://community.wolfram.com/groups/-/m/t/2125818
I have to measure the distance between charged atoms in an amino acid, further will work on protein database data to measure the distance between the atoms in 3 dimensional structure of oligopeptides. I don't know how to go about it, kindly guide me.Kashish Sahil2020-11-29T09:54:21ZIdentity of elements in Wolfram model
https://community.wolfram.com/groups/-/m/t/2114792
” Here x, y and z stand for any elements. (The elements they stand for need not be distinct; for example, x and y could both stand for the element 1.”
As I read this, x and y would both be true of element 1 defined as such. If so, is this to suggest that, at any given time of defining, operating on or ”considering” element 1, it is to be known as of both x and y?
I ask this because I find a potential problem with this in the case any of x,y is actually the element of ”time” as such. Assuming 1 is a node of x= time and y=space, and with function of complete transformation, then I image x is taken for the given y.
If so, the 1 node is of two elements that are (a) mutually exclusive and (b) equally true at once.
(a) because when x is true, y is not and vice versa.
(b) because the unitary transformation is completed within exactly 1 instance of (scalar) time as such.
Conceptually, the paradox being that when 1=y, its identity is effected by retro-causation. That can lead us to assume ”time” is what caused ”space”, which is a misconception as far as I can see.
As I am just trying to grasp the abstract properties of nodes/cells and relating them to concrete physics, I search through the material here to see if the above scenario is adressed, by can’t find anything related. Can someone help me with a reference?
Please let me know if my Q is too vague or doesn’t make sense, and I will try to clarify.Niklas Grebäck2020-11-14T09:36:13ZNeed help to solve numerical coupled differential equation NDSolve[ ]
https://community.wolfram.com/groups/-/m/t/2125785
Hello, I am solving two coupled differential equation given below:
B=2; M=1000; A=30000,a=0.1;
x''[r] + 1/r x'[r] - B x[r]=M;
boundary condition are:
1. x=0 at r=1
2. x'=0 at r=0
Xm= NIntegrate[ (2/a^2)*x[r]*r, {r,0,a} ];
y''[r]+1/r y'[r]= (x[r]/Xm)A
Boundary condition are:
3. y=0 at r=1
4. y'=finite at r=0
I am facing problem when using NDSolve for solving both equation (x[r], y [r]) in coupled form. As Xm and x[r] both present in y[r] equation. Without presence of Xm it is solving.
A test file is attached.
Please help!!!KRISHAN SHARMA2020-11-29T12:59:10ZCode that goes with "Patterns in Combinator Evolution" paper
https://community.wolfram.com/groups/-/m/t/2124038
&[Wolfram Notebook][1]
[1]: https://www.wolframcloud.com/obj/udqbpn/Published/combinatorPatterns.nbEric Parfitt2020-11-25T19:35:16ZAnother way to make graphs out of combinator expressions.
https://community.wolfram.com/groups/-/m/t/2124010
&[Wolfram Notebook][1]
[1]: https://www.wolframcloud.com/obj/udqbpn/Published/combinatorGraphs.nbEric Parfitt2020-11-25T19:08:21ZStandardAtmosphere Package: Definition of ‘ThermalConductivityCoefficient’
https://community.wolfram.com/groups/-/m/t/2123140
Dear Wolfram community,
a question on the definition of the quantity ‘ThermalConductivityCoefficient’ in the StandardAtmosphere Package:
Provided that ‘ThermalConductivityCoefficient’ stands for the thermal conductivity lam acc. to Fourier’s law of heat conduction
q = -lam grad(T),
then lam should be in the order of 0.025 W/(m K) for ambient air.
However, the command in the attached file yields a value of
0.000025362 J / (m s K) for condition at sea level (0 Meters).
This seems to be too low by an order of 3 magnitudes.
Is this quantity based on a different definition, other than assumed above ?
I am using Version 11.3.0.0.ludwig.eineder2020-11-25T12:26:27Z