From c335c05f511a373681d8644500d7750a519f58fa Mon Sep 17 00:00:00 2001 From: Preston Pan Date: Thu, 13 Jul 2023 22:58:59 +0800 Subject: add a lot of things --- mindmap/physics.org | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 mindmap/physics.org (limited to 'mindmap/physics.org') diff --git a/mindmap/physics.org b/mindmap/physics.org new file mode 100644 index 0000000..b70f829 --- /dev/null +++ b/mindmap/physics.org @@ -0,0 +1,36 @@ +:PROPERTIES: +:ID: ece8bf94-4e3c-4939-a77a-9949c1ec0dc6 +:END: +#+title: physics +#+author: Preston Pan +#+html_head: +#+html_head: +#+html_head: +#+options: broken-links:t + +* Laws of Nature +By engaging in physics modeling, we are postulating that there are rules that +"nature" follows, and that these rules are logically consistent. At least, +mathematical models postulate this, and non-mathematical models of the universe +have been relegated to the study of metaphysics. + +* Fields in Physics +** Classical Mechanics +Classical mechanics deals with fields of physics that do not deal with time dilation or quantum +weirdness. It is called classical mechanics because most of these theories were invented before +their quantum or relativistic counterparts, and usually serve as a baseline understanding +for the later topics. +*** Newtonian Mechanics +It all started when Newton created three (but really two) fundamental laws of the universe that +governed all things. +*** Lagrangian Mechanics +This is a different strain of classical mechanics. Instead of looking at direction and vectors, +it looks at a single fundamental principle, even more fundamental than inertia and conservation of momentum: +optimization. We believe that nature always optimizes for some parameters in all physical phenomena. +*** Classical Electrodynamics +Classical electrodynamics attempts to explain the electromagnetic force from a classical perspective. What is +light? How does electricity actually work? All these questions you will find (half) answered in the study +of electrodynamics. +**** [[id:32f0b8b1-17bc-4c91-a824-2f2a3bbbdbd1][Electrostatics]] +This is a study of the force of particles with charge on another in a motionless context. It is the baseline +for studying more complicated electromagnetic theory. -- cgit