PeroK's latest activity
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PeroK replied to the thread Undergrad Velocity of a free particle using Landau's approach.Let's allow ##L## to be any function of ##v^2##. Euler-Lagrange gives: $$\frac d {dt}\big (\frac{\partial L}{\partial... -
PeroK replied to the thread Undergrad Velocity of a free particle using Landau's approach.I don't have Landau, but I'm not sure why this needs to be complicated. In this case: $$L = v_x^2 + v_y^2 + v_z^2$$So: $$\frac{\partial... -
PeroK reacted to CrysPhys's post in the thread Job Skills Physics Careers: Expectations vs. Reality with
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Whether this idea floats around out there (where? the aether?) is moot. A student contemplating spending 6+ yrs to earn a PhD in... -
PeroK reacted to ernestuz's post in the thread Other Hi, I need some advice about how to publish with
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I am not striking the right chord. I don't want to discus any theory, I am looking for information about how to have this thing peer... -
PeroK reacted to Chicken Squirr-El's post in the thread Undergrad The paradox of symmetrical time dilation with
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You and I are standing back to back. I say you are behind me. You say I am behind you. We’re both right, right? -
PeroK reacted to quintinmorrow Refer's post in the thread Undergrad Bell's Theorem looks like Monty Hall problem in reverse with
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Funny comparison, but I think the similarity kind of breaks once you dig into what’s actually being conditioned on. Monty Hall is all... -
PeroK reacted to Astronuc's post in the thread RIP Actor Robert Duvall (95, January 5, 1931 - February 15, 2026) with
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https://www.wtaj.com/trending/actor-robert-duvall-dies-at-95-wife-announces/ I finally watched the movie Secondhand Lions, with Robert... -
PeroK replied to the thread Graduate Horizontal component of the electric field of an infinite uniformly charged plane.The integral is not absolutely convergent. It's divergent improper integrals that cancel each other out by symmetry. If there is no... -
PeroK replied to the thread Graduate Horizontal component of the electric field of an infinite uniformly charged plane.In general, in real analysis, you have to show first that a series is convergent before you can prove that it converges to a real... -
PeroK replied to the thread Graduate Horizontal component of the electric field of an infinite uniformly charged plane.Such paradoxes of divergent series are well known. For example: Take any divergent series ##a_n## and any real number ##L##, then by... -
PeroK reacted to PeterDonis's post in the thread Undergrad Help me understand indeterminism in standard quantum mechanics with
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I'm not sure what you mean. But I might be the wrong person to ask, since my own take on QM interpretations is that, while they can be... -
PeroK replied to the thread Hi. I'm Wayne. A scaffolder from NZ..We get hundreds of threads like this every year. You don't see them because they get deleted. What you wrote would be slightly less... -
PeroK reacted to Ken Fabian's post in the thread Will anyone alive today see a permanent colony on the Moon or Mars? with
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Going to The Klondike in search of riches that were confirmed to be there, so you can take some with you to live somewhere much nicer... -
PeroK replied to the thread Hi. I'm Wayne. A scaffolder from NZ..I read what you wrote before it was deleted. It wasn't a theory. It was just a word salad with no relevance to science.