Physical Constant

Cosma Home > Communication > Knowledge > Realm > Physical > Constant

Spotlight


Related

Pages

Physical Realm
Physical Laws (Constants) Relativity
Matter Molecule, Atom (Periodic Table), Particle
Force Gravity, Electromagnetism (Light, Color)

Resources

These are organized by a classification scheme developed exclusively for Cosma. More…

General

Portal

Fundamental Physical Constants (Institute for Chemistry and Biochemistry)
Physics, Constants, Units, & Uncertainty (NIST)
CODATA Internationally recommended values of the Fundamental Physical Constants (NIST)
CODATA Internationally recommended values of the Fundamental Physical Constants, Universal (NIST)
Physics Fundamentals (Martindale’s Reference Desk)

Encyclopedia

Physical constant, sometimes called fundamental physical constant or universal constant, is a physical quantity that is generally believed to be both universal in nature and have constant value in time. It is contrasted with a mathematical constant, which has a fixed numerical value, but does not directly involve any physical measurement.

There are many physical constants in science, some of the most widely recognized being the speed of light in vacuum c, the gravitational constant G, Planck’s constant h, the electric constant ε0, and the elementary charge e. Physical constants can take many dimensional forms: the speed-of-light signifies a maximum speed for any object and is expressed dimensionally as length divided by time; while the fine-structure constant α, which characterizes the strength of the electromagnetic interaction, is dimensionless. — Wikipedia

Encyclopædia Britannica
Physical Constants (Eric Weisstein’s World of Physics, Wolfram Research)

Search

Physical Constants (Wolfram Alpha)

Library

WorldCat, Library of Congress, UPenn Online Books, Open Library

News

Phys.org, NPR Archives

Book

ISBNdb

Government

Document

USA.gov

returntotop

More…

Phys.org - latest science and technology news stories Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.

  • Researchers invent broad-band tunable terahertz...
    on November 24, 2020 at 1:09 pm

    Recently, a research team led by Prof. SHENG Zhigao from the High Magnetic Field Laboratory of the Hefei Institutes of Physical Science (HFIPS), along with collaborators in HFIPS and ShanghaiTech University, invented a broad-band tunable terahertz (THz) absorber based on a strongly correlated electron oxide material.

  • Light-controlled nanomachine controls catalysis
    on November 23, 2020 at 12:59 pm

    The vision of the future of miniaturization has produced a series of synthetic molecular motors that are driven by a range of energy sources and can carry out various movements. A research group at Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) has now managed to control a catalysis reaction using a light-controlled motor. This takes us one step closer to realizing the vision of a nano factory in which combinations of various machines work together, as is the case in biological […]

  • DNA molecules yield biochemical random number
    on November 20, 2020 at 3:01 pm

    ETH scientists have generated a huge true random number using DNA synthesis. It is the first time that a number of this magnitude has been created by biochemical means.

  • How tissue geometry influences the movement of...
    on November 20, 2020 at 12:11 pm

    Cells move constantly throughout our bodies, performing myriad operations critical to tissue development, immune responses and general wellbeing. This bustle is guided by chemical cues long studied by scientists interested in cellular migration.

  • Enhancing crystal growth using polyelectrolyte...
    on November 19, 2020 at 3:38 pm

    The process of examining characteristics of drug candidates thoroughly is essential for obtaining institutional approvals of new drugs for which high-quality crystallographic data are required. Indeed, growing large crystals of good quality from various substances serves a particular purpose for such processes and analyses. A recent study, affiliated with UNIST has introduced a novel crystal growth method, which enhances crystal growth 10 times faster than the average.