In physics, a dimensionless physical constant is a physical constant that is dimensionless, i.e. a pure number having no units attached and having a numerical...

ratio is dimensionless. The term "fundamental physical constant" is sometimes used to refer to universal-but-dimensioned physical constants such as those...

transformations. Physics relies on dimensionless numbers like the Reynolds number in fluid dynamics, the fine-structure constant in quantum mechanics, and the...

between elementary charged particles. It is a dimensionless quantity (dimensionless physical constant), independent of the system of units used, which...

life. In practice, this hypothesis is formulated in terms of dimensionless physical constants. In 1913, chemist Lawrence Joseph Henderson wrote The Fitness...

Fundamental physical constant may refer to: A dimensionless physical constant, one that is independent of the system of units used A physical constant that is...

dimensionless ratios, or dimensionless physical constants; these topics are discussed in the article. "Table of Dimensionless Numbers" (PDF). Retrieved...

S=\int {\frac {{\rm {d}}Q}{T}}.} One could choose instead a rescaled dimensionless entropy in microscopic terms such that S ′ = ln ⁡ W , Δ S ′ = ∫ d Q...

factor, which is itself dimensionless. Therefore, multiplying by that conversion factor does not change the dimensions of a physical quantity. There are also...

substance is called material constant or constant of matter. (Material constants should not be confused with physical constants, that have a universal character...

The constants listed here are known values of physical constants expressed in SI units; that is, physical quantities that are generally believed to be...

it. Instead of working with Hubble's constant, a common practice is to introduce the dimensionless Hubble constant, usually denoted by h and commonly referred...

such as McWeeny. Dimensionless physical constants retain their values in any system of units. Of note is the fine-structure constant ⁠ α = e 2 / ( 4 π...

1983, but it is not so now. Tests on the immutability of physical constants look at dimensionless quantities, i.e. ratios between quantities of like dimensions...

\alpha } = ⁠1/137.035999177(21)⁠ α {\displaystyle \alpha } is a dimensionless physical constant, so this coincidence is not an artifact of the system of units...

The molar mass constant, usually denoted by Mu, is a physical constant defined as one twelfth of the molar mass of carbon-12: Mu = M(12C)/12. The molar...

bar, in order to produce a dimensionless quantity, ⁠f/po⁠. An equilibrium constant is expressed in terms of the dimensionless quantity. For example, for...

couplings that are dimensionless; i.e., are pure numbers. An example of such a dimensionless constant is the fine-structure constant, α = e 2 4 π ε 0 ℏ...

elementary entities. The numerical value of the constant, the number 6.02214076×1023, is a dimensionless number known as the Avogadro number, commonly denoted...

the fundamental dimensionless physical constants This disambiguation page lists articles associated with the title Fundamental constant. If an internal...

involving a certain number n physical variables, then the original equation can be rewritten in terms of a set of p = n − k dimensionless parameters π1, π2, ....

is an experimentally determined constant, its value being proportional to the dimensionless fine-structure constant, which is known to a relative uncertainty...

{e}{4\pi \varepsilon _{0}r_{0}}}M_{i}} with Mi being the (dimensionless) Madelung constant of the ith ion M i = ∑ j z j r i j / r 0 . {\displaystyle M_{i}=\sum...

matrix or tensor), and whether the quantity is conserved. List of photometric quantities List of radiometric quantities List of dimensionless quantities...

all physical aspects of the universe? Dimensionless physical constants: At the present time, the values of various dimensionless physical constants cannot...

the exact value of the fine-structure constant. The fine-structure constant, a dimensionless physical constant, is approximately 1/137, and the astronomer...

physical law are expressed in this nondimensionalized form, no dimensional physical constants such as c, G, ħ, ε0, nor kB remain, only dimensionless quantities...

electric field strength or flux density. The propagation constant itself measures the dimensionless change in magnitude or phase per unit length. In the context...

magnetization of a material Proton-to-electron mass ratio, a dimensionless physical constant Reduced mass, the "effective" inertial mass appearing in the...

macro-world and the micro-world. Physics portal Dimensionless physical constant – Physical constant with no units Hierarchy problem – Unsolved problem...