TSny's latest activity
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TSny reacted to hmparticle9's post in the thread The flux through a cylinder from a charge at the origin with
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From looking at a diagram, the only component we need to worry about is the component of the flux in the ##z##-direction. The other... -
TSny reacted to robphy's post in the thread I Dirac's 1972 Boston talk on Projective geometry in quantum mechanics with Like.
The use of the colon in the originally-given url is odd: https://repository.lib.fsu.edu/islandora/object/fsu:195 Try...
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TSny replied to the thread I Dirac's 1972 Boston talk on Projective geometry in quantum mechanics.I think these are the notes. They look sketchy, but there are a few diagrams.
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TSny reacted to Steve4Physics's post in the thread Equilibrium Position of a Hanging Candy Cane with Like.
FWIW here's a (quite short) solution using the 2D rotation matrix – or rather just its first row for transforming the x-coordinate...
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TSny reacted to kuruman's post in the thread Equilibrium Position of a Hanging Candy Cane with Like.
For the record, here is my solution. In the figure on the right the two black dots represent the centers of mass of the semicircle (top)...
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TSny reacted to vela's post in the thread LC oscillations - two capacitors and an inductor with Like.
To fill in a step that wasn't immediately clear to me in the solution in post #3: when the current ##i## is at a maximum, the voltage...
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TSny replied to the thread LC oscillations - two capacitors and an inductor.But I think it's interesting to determine the polarity of the 4 plates at the instant when the current first reaches a maximum (assuming...
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TSny replied to the thread LC oscillations - two capacitors and an inductor.I think this is OK. I’m not sure of your sign conventions for the charges on the capacitors. For example, does your charge ##q##...
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TSny reacted to vela's post in the thread LC oscillations - two capacitors and an inductor with Like.
Are you sure both capacitors are discharged completely when the current through the inductor is at a maximum? That’s true in the case...
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TSny replied to the thread LC oscillations - two capacitors and an inductor.Yes. Good.
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TSny replied to the thread LC oscillations - two capacitors and an inductor.Consider the section colored blue. This is a single piece of conductor. What is the initial total charge on this piece? Does the...
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TSny replied to the thread B Feynman QED Questions.Consider, for example, the arrows corresponding to reflections from C and G in Figure 24. Feynman is saying that the lengths of these...
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$$\frac{1-\delta}{[2(1-\delta)]^{\frac{3}{2}}} = \frac{1}{2^{\frac{3}{2}}} (1-\delta)^{-\frac{1}{2}} \approx \frac{1}{2^{\frac{3}{2}}}...
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TSny replied to the thread 5 charges within a square boundary.Since the numerator of ##F_{right}## has a factor ##(1-\delta)##, it will be easier to first simplify ##\dfrac{1-\delta}...
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TSny replied to the thread 5 charges within a square boundary.The right-hand is not a correct first-order approximation to the left-hand side. The expression ##2-2\delta + \delta^2## can be...
