These are organized by a classification scheme developed exclusively for Cosma. More…
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)
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
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Big data could yield big discoveries in...
on February 25, 2020 at 9:15 pm
Centuries of archaeological research on the Inca Empire has netted a veritable library of knowledge. But new digital and data-driven projects led by Brown University scholars are proving that there is much more to discover about pre-colonial life in the Andes.
Designing today's cities for tomorrow's challenges
on February 24, 2020 at 1:50 pm
Even if you aren't an avid gamer, chances are you've heard of SimCity. Released in 1989 and distinguished by its open-ended gameplay, SimCity gave many players their first taste of full control over a city's development, forever cementing its place in video game history.
Manipulating surface tension in fluids to suit...
on February 24, 2020 at 1:49 pm
What do dishwashing liquid and nonstick pans have in common? Besides the fact that one is used to clean the other after cooking, both household items derive their usefulness by affecting the physical properties of fluids and the surfaces those fluids come into contact with.
Aerosol optical tweezers advance understanding of...
on February 21, 2020 at 2:27 pm
Two studies led by faculty in Carnegie Mellon University's Center for Atmospheric Particle Studies show how aerosol optical tweezing can allow scientists to scrutinize the components of the atmosphere with new precision.
Eighteen-hour-year planet on edge of destruction
on February 20, 2020 at 4:28 pm
Astronomers from the University of Warwick have observed an exoplanet orbiting a star in just over 18 hours, the shortest orbital period ever observed for a planet of its type.