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:
× 45
a system of units where certain dimensionful constants are set to 1. This often simplifies various formulae.
× 2
× 117
A transition by which the energy of at least one photon is completely transferred to a material.
× 864
The rate of change of velocity of a body per unit of time.
× 88
is appropriate for questions dealing with the physics of beams in accelerators (synchrotrons, cyclotrons, linacs, betatrons and other types of accelerators); the ways in which beams are generated; the…
× 16
the disk around a compact star that accumulates matter from e.g. a companion star by the Roche lobe overflow or stellar wind transfer.
× 976
the interdisciplinary science that deals with the study of all mechanical waves in gases, liquids, and solids including vibration, sound, ultrasound and infrasound. Applications of acoust…
× 287
the integral of the Lagrangian over time, or the integral of the Lagrangian Density over both time and space.
× 13 × 116
Thermodynamic processes that occur without exchanging heat between the system and its environment.
a type of diagram on lattices, encoding equations of supersymmetry.
× 248
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…
× 341
A subset of [tag:fluid-dynamics] concerning primarily forces such as lift and drag generated on bodies as they move through gasses or as gasses move through the body (typically air).
× 65
Aether(or ether) relates to the material which supposedly fills the entire universe. It is a concept used to understand action at a distance. Aether was described by Huygen as an "omnipresent, perfect…
× 3
× 358
a layer of gases that surround it, permitting life and protecting life by absorbing ultraviolet solar radiation, warming the surface by retaining the heat and mitigating the temp…
× 121
man-made vehicles intended to operate while flying through Earth's atmosphere.
× 19 × 45
× 9
related to scattering amplitudes.
× 33 × 8
× 1146
The conserved quantity arising from a rotational invariance. Combine with rotational-dynamics for the classical mechanics approach and quantum-mechanics for the QM interpretation
× 211
The time derivative of angular position used when studying rotating objects or systems.
× 18
× 116 × 21
This can be used for the strong or weak anthropic principle. Please be sure to mention in your question which you are talking about.
× 41