# Tags

A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

 Type to find tags:
 rotational-kinematics× 196 A tag for questions about rotational motion, including angular velocity and angular acceleration. speed× 196 the magnitude of velocity. atmospheric-science× 195 The study of the composition or dynamics of the gaseous layers around planets, often applied to questions on Earth's atmosphere but can be applicable to all planets & moons in the solar system. galaxies× 194 Massive systems held together by gravitational attraction, consisting of stellar associations, star systems, star clusters and types of interstellar clouds, stellar remnants, gasses, cosmic dust and a… noethers-theorem× 193 A theorem that relates continuous symmetries (continuous transformations that don't affect the value of the lagrangian) to quantities conserved in time. particles× 193 biophysics× 193 wave-particle-duality× 189 dimensional-analysis× 185 Dimensional analysis means to obtain results by analyzing the units in question, etc. DO NOT USE THIS TAG if your question is about degrees of freedom or spatial dimensions. cosmological-inflation× 182 Cosmological inflation refers to an era of expansion that lasted for approximately $10^{-34}$ seconds, during which the universe expanded by a factor of approximately $10^26$ in every direction. This … tensor-calculus× 182 topology× 180 linear-algebra× 180 To be used for linear algebra, and closely related disciplines such as tensor algebras and maybe clifford algebras. higgs× 180 This higgs field breaks electroweak symmetry and provides mass to particles though a process called the higgs mechanism. The excitation of the higgs field is called a higgs boson. software× 179 rocket-science× 179 Colloquially referred to as one of the hardest professions, rocket science is actually a common name for spacecraft/space-systems engineering. However, one can also generalize this to include all form… spinors× 175 popular-science× 172 must be answered in a manner that can be understood by a general audience with at most a basic understanding of physics, mathematics and related sciences. Apply it to questions w… ads-cft× 172 a special case of the holographic principle. It states that a quantum gravitating theory in Anti-de-Sitter (AdS) space is exactly equivalent to the gauge theory/Conformal Field Theory (CFT… action× 171 the integral of the Lagrangian over time, or the integral of the Lagrangian Density over both time and space. boundary-conditions× 171 differentiation× 170 perturbation-theory× 168 Perturbation theory refers to methods for understanding physical systems by treating them as small modifications to exactly solvable systems. induction× 166 density× 165 defined as the mass per unit volume of a substance. stress-energy-tensor× 165 A rank-2 tensor in relativity, which expresses the flux of energy-momentum along timelike and spacelike axes. Also known as the energy-momentum tensor. In the Einstein field equations, it is the sourc… oscillators× 163 statics× 161 Analysis of a system of bodies where all forces are in balance and there is no motion relative to a chosen reference frame. radioactivity× 161 The property of some materials by which individual atoms decay, emitting energy or particles often transforming into different elements in the process. geophysics× 160 The study of the physical processes and properties of the planet Earth. Applicable to many subjects about Earth, such as its shape, its magnetic field, and ocean currents. observers× 156 causality× 155 dark-energy× 154 the unknown form of energy that drives the acceleration of the universe's expansion. surface-tension× 154 Surface tension occurs due to the tendency of liquid molecules to favor their own kind. Surface tension is important in fluid multiphase systems typically at small length and velocity plasma-physics× 153 Theory, experiments and calculations related the physics of plasmas, i.e., matter constituted by ionized atoms. elasticity× 153