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== Fractal Universe and Variable Planck Constants == ...his theory connects concepts of quantum fluctuations, variable fundamental constants, and the hierarchical arrangement of the universe into a single speculative ...

....|date=July 2, 2024}}</ref> The terms ''[[mathematical constant]]'' or ''[[physical constant]]'' are sometimes used to distinguish this meaning.<ref>{{Cite web where {{mvar|a}}, {{mvar|b}} and {{mvar|c}} are constants ([[coefficient]]s or parameters), and {{mvar|x}} a [[Variable (mathematics) ...

...'''32''' 965-71 (1959)</ref> is a [[linear free-energy relationship]] in [[physical organic chemistry]]. It is a modified version of the [[Hammett equation]] t ...} and {{mvar|&sigma;^&minus;}} represent the Hammett substituent constants for reactions in which positive or negative charges are built up at the rea ...

...7=P.C. |last7=Schmidt|year=2003|title=Ab-initio calculation of the elastic constants and thermal expansion coefficients of Laves phases|journal=Intermetallics|v ...es of thermoelectric zinc antimonide using first-principles calculations., Physical Review B 85.22 (2012) {{ArXiv|1207.1670}}.</ref> ...

...t mass]] of the electron. It is one of the fundamental [[Physical constant|constants]] of [[physics]]. It has a value of about {{physconst|me|round=3|unit=[[kil ...to determine its mass from an experiment, if the values of other physical constants are already considered known. ...

...nce master curve]] and ''C''₁, ''C''₂ are empirical constants adjusted to fit the values of the superposition parameter ''a''_T ...bove T_g and do not represent Arrhenius behavior. Therefore, the constants obtained above T_g are not useful for predicting the response of ...

...ature dependence of the heat of vaporization of pure liquids''. Journal of Physical Chemistry (USSR), v. 32(8), p. 1893, 1958;</ref> ...Shimansky equation does not contain any arbitrary [[constant (mathematics)|constants]], since the value of {{mvar|T{{sub|C}}}} can be determined experimentally ...

{{Short description|Dimension for scale of a physical system}} ...acteristic length''' is an important dimension that defines the scale of a physical system. Often, such a length is used as an input to a formula in order to ...

...surement)|coherent set]] of units of measurement designed so that chosen [[physical constant]]s fully define and are included in the set. ...itation |last=Stoney |first=G. Johnstone |date=May 1881 |title=LII. On the physical units of nature |url=https://www.tandfonline.com/doi/full/10.1080/147864481 ...

...first2 = R P | last3 = Beynon | first3 = J H | journal = Annual Review of Physical Chemistry | volume = 30 | pages = 51–78|bibcode = 1979ARPC...30...51B }}</r ...the mass spectrometer between the ion source and the detector. These rate constants are indicated in the Wahrhaftig diagram by the log ''k'' = 5 and log ''k'' ...

where [, ] is a generalisation of a [[Lie bracket]] which gives the group constants. ...l | title=Gauge Symmetry and Supersymmetry of Multiple M2-branes | journal=Physical Review D | volume=77 | date=2008-03-07 | issue=6 | doi=10.1103/PhysRevD.77 ...

{{short description|Units of measurement based on universal physical constants}} ...e the system of units and the relevant physical laws contain no conversion constants. ...

...verse [[pressure gradient]]s. The formulation of the SST model is based on physical experiments and attempts to predict solutions to typical engineering proble ..._k, σ_ω are computed by a blend from the corresponding constants via the following formula ...

...ative coupling between the scalar field and the matter Lagrangian |journal=Physical Review D |volume=90 |issue= 2 |pages=023017 |doi= 10.1103/PhysRevD.90.02301 |journal=Physical Review D ...

where <math>\alpha_i</math>s are the integration constants. Let us assume that from the above set, we are able to solve <math>\alpha_i ...f the Boltzmann equation for the study of ionized gases of low density. I. Physical Review, 102(1), 12.</ref><ref>Chandrasekhar, S., (1960). Plasma physics. Un ...

...lar solution of Vlasov–Poisson equation system| url = | journal = European Physical Journal Plus | volume = 136 | issue = 6| page = 670 | doi = 10.1140/epjp/s1 where <math>G</math> and <math>\Lambda</math> are constants. The first term is the familiar law of universal gravitation, the second on ...

...e time or location of the experiment. The constancy (immutability) of any "physical constant" is thus subject to experimental verification. ...irac]] in 1937 [[Dirac large numbers hypothesis|speculated]] that physical constants such as the [[gravitational constant]] or the [[fine-structure constant]] m ...

...moved from New York to New England for graduate studies, earning a PhD in physical chemistry from the [[Massachusetts Institute of Technology]] in 1925.<ref n ...he first being "Intensities in the Stark Effect of Helium," published in [[Physical Review]] in 1926.<ref name=":2" /> ...

{{Short description|Equation in physical chemistry}} In [[physical organic chemistry]], the '''Swain–Lupton equation''' is a [[Free-energy rel ...

...nation from the APS Topical Group on Precision Measurement and Fundamental Constants, "for her contributions to the understanding of atomic structure through pr ...award_fellowship%5Bpage%5D=99|title=APS Fellows archive|publisher=American Physical Society|access-date=2025-01-28}}</ref> ...