# 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:
 history× 323 The historical development of physics concepts: who did what and when. quantum-interpretations× 322 for questions relating to what, if anything, the quantum mechanical formalism and experimental results say about the way the world works. heat× 320 energy transferred from one system to another by thermal interaction. In contrast to work, heat is always accompanied by a transfer of entropy. Heat flow is characteristic of macroscopic objec… field-theory× 315 units× 315 standards of measurement used for different types of quantities. projectile× 312 Object moving through space due to the exertion of a force. capacitance× 300 The ability of an object to store electric charge. atoms× 295 A nucleus made of protons and neutrons surrounded by a cloud of electrons equal in number to the protons. superconductivity× 287 the transmission of current with no resistive losses, and is one of the most active areas of condensed matter physics research. classical-electrodynamics× 283 space× 280 The near-vacuum extending between the planets and stars, containing small amounts of gas and dust. Also called outer space to refer to the physical universe beyond the Earth's atmosphere. planets× 280 Celestial body that orbits following an elliptical path around a star or stellar remnant. refraction× 278 Change in the direction of propagation of a wave when its transmitting medium changes. definition× 272 is used in situations where the question is either about how some term or concept is define or where the validity of an answer depends on a subtle definition of some term or concept… physical-chemistry× 271 Study of macroscopic and microscopic phenomena in chemical systems in terms of physical laws and concepts [thermodynamics, statistical mechanics, kinetic theory, quantum mechanics...]. voltage× 269 the unit of measurement for electronic potential, from one point location to another. torque× 268 The tendency of a force to rotate an object about an arbitrary axis. mathematics× 267 just because your question involves math! If your question is on simplification of a mathematical expression, please ask it at math.stackexchange.com The mathematics tag covers non… measurement-problem× 264 for questions about the exact nature of wavefunction collapse. tensors× 264 curvature× 263 Use this for questions pertaining to curvature of manifolds. Does not need to be specific to general relativity, but also for curvature of e.g. a [tag:calabi-yau] manifold. group-representations× 262 home-experiment× 259 questions concerning measurements, experiments, and activities that demonstrate physics and are safe to do at home, require at most one tool or ingredient not readily available, and can be interpreted… vacuum× 259 A region of space devoid of any fluid molecules resulting in a zero pressure in ideal cases. In practice, even space has a small but finite number of molecules. faster-than-light× 257 "Faster-than-light", also known as superluminal velocities, refers to any sort of travel at a speed greater than the speed of light. Prohibited in mainstream physics due to the Special theory of … thermal-radiation× 256 The temperature-dependant emission of electromagnetic waves. Combine this tag with [tag:thermodynamics] for a macroscopic view or [tag:quantum-mechanics] for a microscopic explanation. fourier-transform× 252 A unitary linear operator which resolves a function on $\mathbb{R}^N$ into a linear superposition of "plane wave functions". Most often used in physics for calcalating the response of a time shift inv… double-slit-experiment× 250 The double slit experiment involves passing light through two parallel slits to demonstrate that the light from one slit interferes with that from the other. probability× 250 frequency× 246 the rate of repetitive aspect in the amplitude over a given dimension. aerodynamics× 245 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). sun× 245 an almost perfectly symmetric yellow dwarf star [spectral class G2V] which is at the center of our Solar System. quantum-chromodynamics× 242 the quantum field theory believed to describe the strong nuclear force. air× 238 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… dimensions× 236 for dimensions of a manifold, typically the space-time. DO NOT USE THIS TAG for dimension of a physical quantity. maxwell-equations× 236 The four fundamental fundamental equations of electromagnetism.