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 …
Collection of Lame Jokes | Page 795 • Physics Forums
Feb 12, 2026 · Dis an Apple Dis a (p)pear: The thread centers around sharing and enjoying lame jokes, with participants contributing various humorous quips and puns. The discussion explores the nature …
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 …
Time travel without paradox • Physics Forums
Jan 11, 2025 · Time travel is logically possible. IF you moved faster than light or even a little less with time-dilation taking effect you live on another timeline. It is not synchronized with those on …
When did Mitochondria Evolve? - Physics Forums
Feb 8, 2016 · Eukaryote evolution and cellular complexity Historically, life is categorized into three broad domains: bacteria, archaea, and eukaryota. Whereas bacteria and archaea are almost all relatively …
Feynman's bug (hot plate) in generality • Physics Forums
Aug 10, 2021 · A textbook (in German language: Sexl-Urbantke, Gravitation und Kosmologie) says that intrinsic curvature of spacetime is a definition. The alternative is to postulate a flat spacetime …
Thrust Bearings and Smooth Journal Bearings reaction moment?
Sep 6, 2017 · The discussion revolves around the presence of reaction moments in thrust bearings and smooth journal bearings, as referenced in R. C. Hibbeler's textbook on Mechanics of Materials. …
Is a Cusp Considered an Inflection Point in Calculus?
Mar 23, 2011 · is a point only considered an inflection point if a tangent (whether vertical or not) exists or just whether just that f(c) is continuous suffices. For instance, is a cusp/corner point eligible for being …
What Is the Longest and Most Complex Chemical Equation Known?
Nov 19, 2003 · The discussion revolves around identifying the longest and most complex chemical equations known, with participants exploring various interpretations of what constitutes a "tough" …
DIY Particle Accelerator (with magnetic ball) - Physics Forums
Mar 25, 2024 · The discussion revolves around the design and functioning of a DIY particle accelerator utilizing magnetic forces to accelerate a magnetic ball in a circular path. Participants explore the …