• This Week’s Hype

    Updated: 2024-10-15 21:07:33
    Today’s Washington Post has an opinion piece from Brian Greene, running under the demonstrably false title Decades later, string theory continues its march toward Einstein’s dream. In the piece, the argument of string theory critics is given as: Critics argue … Continue reading →

  • Special Relativity by Prof. Shiva Prasad on NPTEL (a lecture course)

    Updated: 2024-10-15 20:41:57
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  • Mathematical disagreement with inverse square law?

    Updated: 2024-10-15 19:48:12
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  • Acceleration in quantum mechanics

    Updated: 2024-10-15 19:19:10
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  • Do black holes have magnetic fields?

    Updated: 2024-10-15 19:16:51
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  • artist, graphic artist, 3D artist

    Updated: 2024-10-15 17:17:43
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  • Help with math terminology #2

    Updated: 2024-10-15 16:56:21
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  • "Accelerations" as higher order derivatives

    Updated: 2024-10-15 16:40:56
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  • Entanglement in QM interpretations

    Updated: 2024-10-15 15:51:13
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  • Vacuum entanglement: between what and what, exactly?

    Updated: 2024-10-15 14:07:23
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  • Boundary conditions for magnetic fields

    Updated: 2024-10-15 10:13:05
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  • Books on D Operator Method

    Updated: 2024-10-15 05:16:15
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  • Schrodinger equation/Madelung equation phase transformation

    Updated: 2024-10-15 04:34:30
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  • Question about Open Library (borrowing books online)

    Updated: 2024-10-15 00:55:24
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  • Is There A Study Showing The Observer Effect Ignoring Conscious Intent?

    Updated: 2024-10-14 19:22:33
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  • SR-time dilation vs GR-time dilation on rotating Earth

    Updated: 2024-10-14 17:18:13
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  • Chain Rule (partial derivatives): basic interpretation question

    Updated: 2024-10-14 16:15:39
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  • A paradox about energy balance and steady state

    Updated: 2024-10-14 16:05:04
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  • Momentum question: Object dropped onto a moving railcar

    Updated: 2024-10-14 15:27:07
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  • Stargazer

    Updated: 2024-10-14 13:54:55
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  • What an author did when paper was proved wrong

    Updated: 2024-10-14 13:17:44
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  • Different Substitution for Solving an Integral

    Updated: 2024-10-14 13:03:43
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  • Solving system of 3 quadratic equations

    Updated: 2024-10-14 11:16:32
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  • Maximum exhaust velocity for a De Laval nozzle

    Updated: 2024-10-14 04:27:05
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  • Reciprocal time dilation

    Updated: 2024-10-14 03:16:13
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  • Unable to produce desired results using state-space model with observer for inverted pendulum

    Updated: 2024-10-14 03:02:39
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  • Rotation of the stress tensor

    Updated: 2024-10-13 21:38:24
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  • Expectation value of the momentum for an electron in a box

    Updated: 2024-10-13 17:31:15
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  • Physics adult learner

    Updated: 2024-10-13 17:12:35
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  • Podcast About String Theory, Other Items

    Updated: 2024-09-14 06:41:20
    A few weeks ago I recorded a podcast with Robinson Erhardt, which has now appeared as String Theory and the Crisis in Physics. We mainly talk about the current situation of string theory in physics and the history of how … Continue reading →

  • The Terrifying Power of Mathematics

    Updated: 2024-08-29 20:21:35
    Ted Jacobson has put on the arXiv a transcription of a 1947 Feynman letter about his efforts to better understand the Dirac equation, in order to find a path integral formulation of it. The letter also contains some fascinating comments … Continue reading →

  • The Elegant Universe: 25th Anniversary Edition

    Updated: 2024-08-20 19:31:13
    Brian Greene’s The Elegant Universe is being reissued today, in a 25th anniversary edition. It’s the same text as the original, with the addition of a 5 page preface and a 36 page epilogue. The initial excitement among some theorists … Continue reading →

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