vela's latest activity
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I suggest using the subjunctive here. -
vela replied to the thread Other Which branch of engineering is more physics heavy?.I think so too. There's some overlap, but there can still be a pretty big gap between the two majors. To properly prepare for physics...
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vela replied to the thread Site Usability nitpick -- Hyperlinks should be underlined.Is PF a link-heavy site? In my brief look at a number of sites the other day, I noticed most sites don't underline every link, but they...
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vela replied to the thread Site Usability nitpick -- Hyperlinks should be underlined.Kagi search results, on the other hand, do have underlined links. So do the sites for the New York Times, the LA Times, the Washington...
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vela reacted to robphy's post in the thread Site Usability nitpick -- Hyperlinks should be underlined with
Like.
At the recent AAPT meeting, one of the updates to Glowscript/WebVPython is an improvement to better support accessibility. possibly... -
vela replied to the thread Need a book on Modern Physics to supplement Griffiths QM.Then I think it would help, as @robphy suggested above, if you could give us an example of a roadblock you're running into. Maybe you...
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vela replied to the thread Confusion In Writing Identical Particle Wavefunctions.It is. My point was that if same spin meant both spin-up or both spin-down, it would correspond to only two of the triplet states and...
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vela replied to the thread Confusion In Writing Identical Particle Wavefunctions.The same thought occurred to me; however, the solution explicitly lists all three of the triplet states and claims there's a threefold...
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vela replied to the thread Confusion In Writing Identical Particle Wavefunctions.I don't get it either. I think he's wrong, but the same text is in the second edition. I would think that an obvious error like that...
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vela reacted to DavidW's post in the thread Quantum Modern Quantum Mechanics 3rd Ed: J. J. Sakurai & Jim Napolitano Review with Like.
I'm studying Sakurai now to keep my mind busy during the summer. It is not an introductory book. He assumes you've already completed a...
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vela replied to the thread Insights Fixing Things Which Can Go Wrong With Complex Numbers.Isn't the complex logarithm traditionally denoted ##\log##, not ##\ln##? I noticed in a couple of places you used principle where you...
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Going with this idea, consider two rockets with equal thrust pulling on both end of a string. This presents the same ‘seeming’...
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vela replied to the thread B Simple mass/scale puzzle.Here are two free-body diagrams of the scale. One for your scenario (left) and one for the scale suspended from the ceiling (right). As...
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vela replied to the thread Quantum mechanics book recommendations.Is Griffiths your first exposure to quantum mechanics? If so, you might consider working through the chapters on modern physics in an...
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vela reacted to PeroK's post in the thread I Problem in understanding instantaneous velocity with Like.
It's not possible. Instantaneous velocity is part of the mathematical model. In Newtonian physics you can postulate that a particle...
