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Delta2's latest activity
Delta2
reacted to
Haorong Wu's post
in the thread
Prove that phase-conjugate waves satisfy Maxwell's equations
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Like
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This is the second part of a problem. In the first part of the problem, I have proven that ##\mathbf E^* =\mathbf E_0^* ( \mathbf r)...
Today, 12:30 AM
Delta2
reacted to
Office_Shredder's post
in the thread
Two variables in one equation...
with
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Why don't you just post the whole solution you constructed, and we can tell you if there's anything wrong with it.
Today, 12:23 AM
Delta2
reacted to
ehild's post
in the thread
Ideal gas: two tanks connected by a cylinder
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Like
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I undersrand the problem that both tanks are in heat baths, A at 200 k, B at 300 K. The tanks are empty at the beginning.One moll gas is...
Yesterday, 11:34 PM
Delta2
reacted to
tech99's post
in the thread
This is why EM interference can be an issue...
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Like
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A CRT requires a line scan frequerency which is at about 16 kHz (625 system) and is delivered to the scan coils at around 25 Watts...
Thursday, 8:48 AM
Delta2
reacted to
BWV's post
in the thread
I
Isn't it terrifying that AI can become smarter than any Mathematician?
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Like
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Math and physics are simple, mature disciplines with likely only marginal future improvements biology and biochemistry is where AI can...
Thursday, 8:39 AM
Delta2
reacted to
curiosissimo's post
in the thread
Using Kirchhoff's laws on this current division problem
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Like
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The main problem is the verse of the 2 currents ## i1 ## and ## i2 ## . I think they both go clockwise, so in the node A we should have...
Wednesday, 8:00 AM
Delta2
reacted to
EpselonZero's post
in the thread
Solve this integral involving a quadratic and linear air resistance equation
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Hi, I'm trying to solve this integral and then isolate V, but I can't get the right answer. I don't know where is my errors. I probably...
Sep 18, 2020
Delta2
reacted to
TSny's post
in the thread
Solve this integral involving a quadratic and linear air resistance equation
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Like
.
Could these be equivalent?
Sep 18, 2020
Delta2
reacted to
angela107's post
in the thread
Determining the domain and range for the function ##f^{-1}##
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The domain and range of this function will be the same. We can let ##𝑓(𝑥)=\sqrt{x},𝑥≥0## However, ##𝑦=𝑓(𝑥)≥0##, so the domain and...
Sep 13, 2020
Delta2
reacted to
vanhees71's post
in the thread
Divergence of a radial field ##F=\hat{r}/r^{2+\varepsilon}##
with
Like
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To save even more paper you can also use the Einstein summation convention and drop the summation symbols.
Sep 11, 2020
Delta2
reacted to
haruspex's post
in the thread
Kinematics, Conservation of energy, momentum
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That equation could be useful if you wanted to find the speed with which the small piece hit the ground, but you don't care about that...
Sep 11, 2020
Delta2
reacted to
pasmith's post
in the thread
Divergence of a radial field ##F=\hat{r}/r^{2+\varepsilon}##
with
Like
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\sum_i\frac{\partial}{\partial x_i} \left(\frac{x_i}{r^{3+\epsilon}}\right) = \sum_i\left(\frac{1}{r^{3 + \epsilon}}\frac{\partial...
Sep 10, 2020
Delta2
replied to the thread
Divergence of a radial field ##F=\hat{r}/r^{2+\varepsilon}##
.
Well you have compactified some steps (for example i would like to see the representation of the radial field in cartesian coordinates...
Sep 10, 2020
Delta2
replied to the thread
Divergence of a radial field ##F=\hat{r}/r^{2+\varepsilon}##
.
Like the others i dont see anything wrong in your work. Maybe it is kind of simple because it is done in spherical coordinates. Try to...
Sep 10, 2020
Delta2
reacted to
PeroK's post
in the thread
Divergence of a radial field ##F=\hat{r}/r^{2+\varepsilon}##
with
Like
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There's nothing missing that I can see.
Sep 10, 2020
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