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  1. Derivative of the Volume of a Cone - Physics Forums

    Nov 25, 2007 · The discussion revolves around finding the derivative of the volume of a cone, specifically in the context of related rates problems in calculus. Participants explore the implications …

  2. What Exactly is Dirac's Delta Function? - Physics Forums

    Aug 29, 2025 · In Dirac's Principles of Quantum Mechanics published in 1930 he introduced a "convenient notation" he referred to as a "delta function" which he treated as a continuum analog to …

  3. A philosopher who challenges the basics and their assumptions

    Nov 27, 2024 · I'm a philosopher who has challenged some basic assumptions, particularly physics. I produced and published an anomalous experiment on Zenodo that challenges the predictive energy …

  4. Retiree • Physics Forums

    Feb 27, 2026 · I was a bold teenager who had flashes of insight. I am now a retired mathematician who is not as fast but still original.

  5. Rush Redux 2026 - Physics Forums

    Feb 27, 2026 · Geddy Lee and Alex Lifeson apparently decided reform Rush for a new road tour in 2026-2027. Lifeson came over to Europe for some health checks, and Lee decided to come with …

  6. Abel Prize awarded, 2026, to Gerd Faltings • Physics Forums

    Mar 19, 2019 · TL;DR Abel Prize awarded, 2026. To German Mathematician Gerd Faltings, who had won the Fields medal in 1986, for his work on the Mordell Conjecture. Now we know ( joke) why …

  7. Gravitons/ Gravity • Physics Forums

    5 days ago · Hi I was wondering what determines whether the Graviton(assuming they exist) get absorbed or pass through an object?

  8. Yet another aspiring scientist • Physics Forums

    Mar 18, 2026 · My name is Echo, and I am a high school senior from Georgia. I plan on majoring in biochemistry and pursuing a career in forensic pathology. My end goal is to hopefully partner with …

  9. Why is HCl called Hydrogen Chloride (by IUPAC naming)?

    Nov 25, 2020 · The discussion revolves around the IUPAC naming of HCl, specifically why it is referred to as hydrogen chloride rather than hydrogen monochloride. Participants explore the implications of …

  10. Difference between arctan (x) and cot (x) • Physics Forums

    Jul 20, 2009 · The discussion clarifies the distinction between the functions arctan (x) and cot (x). Arctan (x), defined as tan -1 (x), is the inverse function of tan (x), while cot (x) is defined as 1/tan (x). The …