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:
× 115
The subfield of optics in which light propagation is approximated in terms of rays. It mainly includes reflection and refraction on surfaces.
× 115
quantify location in space.
× 114
The central term in the hamiltonian formalism. Can be interpreted as an energy input, or "true" energy.
× 114
× 113 × 112
A law in Classical Electromagnetism and Newtonian Gravity.
× 112
The property of some materials by which individual atoms decay, emitting energy or particles often transforming into different elements in the process.
× 112
× 111
The change in position of an object relative to a frame of reference. DO NOT USE THIS TAG just because the question contains motion! Almost all physical systems contains motion. Hence it is often …
× 111 × 111
Gaseous layer around a planet, dwarf planet, or a star.
× 110
× 110 × 109 × 109 × 109
A smaller body orbiting a larger, primary body, where the primary body is not a star.
× 107
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.
× 106
Analysis of a system of bodies where all forces are in balance and there is no motion relative to a chosen reference frame.
× 105 × 104
× 103
for topological field theory (Tft) and topological string theory (tst) questions.
× 101
A tag for questions about rotational motion, including angular velocity and angular acceleration.
× 101
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
× 101
× 100 × 99
defined as the mass per unit volume of a substance.
× 99
World's largest particle accelerator built by the CERN (European Organization for Nuclear Research) near the Franco-Swiss frontier near Geneva, Switzerland. It is designed to collide beams of protons…
× 99
To be used for linear algebra, and closely related disciplines such as tensor algebras and maybe clifford algebras.
× 98 × 97 × 96 × 95
× 93
Could refer to (1) A hydrogen molecule; two hydrogen atoms bonded together or (2) A hydrogen atom; One electron electromagnetically interacting with a nucleus made of a single proton. Hydrogen atoms a…
× 93 × 92 × 92
the integral of the Lagrangian over time, or the integral of the Lagrangian Density over both time and space.