The Constants of Nature
The Constants of Nature

Author: John Barrow

Publisher: Vintage

Published: 2009-05-06

Total Pages: 370

ISBN-13: 0307555356

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Reality as we know it is bound by a set of constants—numbers and values that dictate the strengths of forces like gravity, the speed of light, and the masses of elementary particles. In The Constants of Nature, Cambridge Professor and bestselling author John D.Barrow takes us on an exploration of these governing principles. Drawing on physicists such as Einstein and Planck, Barrow illustrates with stunning clarity our dependence on the steadfastness of these principles. But he also suggests that the basic forces may have been radically different during the universe’s infancy, and suggests that they may continue a deeply hidden evolution. Perhaps most tantalizingly, Barrow theorizes about the realities that might one day be found in a universe with different parameters than our own.

Quantities, Units and Symbols in Physical Chemistry
Quantities, Units and Symbols in Physical Chemistry

Author: International Union of Pure and Applied Chemistry. Physical and Biophysical Chemistry Division

Publisher: Royal Society of Chemistry

Published: 2007

Total Pages: 240

ISBN-13: 0854044337

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Prepared by the IUPAC Physical Chemistry Division this definitive manual, now in its third edition, is designed to improve the exchange of scientific information among the readers in different disciplines and across different nations. This book has been systematically brought up to date and new sections added to reflect the increasing volume of scientific literature and terminology and expressions being used. The Third Edition reflects the experience of the contributors with the previous editions and the comments and feedback have been integrated into this essential resource. This edition has been compiled in machine-readable form and will be available online.

Physical Constants
Physical Constants

Author: G.W. Childs

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 105

ISBN-13: 9401169306

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Time changes most things, and physical constants are seem ingly not immune from this contingency. The publishers' suggestion for a new edition has provided an opportunity for a thorough scrutiny of the contents of this book and for the adjustment to some fourteen years of changes since the last edition. At the same time the contents have been increased by the addition of one or two new tables, and current moves towards the adoption of an international system of units ex plain the appearance in the book, wherever it is practicable, of S. 1. units. However, the habits of a lifetime are not easily changed, and it is too much to expect that despite careful proofreading the change of units has been carried through without errors. I shall be grateful for intimation of such mis takes. I wish moreover to thank all those who in the past have taken the trouble to draw my attention to errors, or to superior determinations, or simply to offer advice or criticism. For those who do not find what they seek in this collection, more complete compilations of physical constants are to be found in: Tables of Physical and Chemical Constants, G. W. C. Kaye and T. H. Laby, 13th edition 1966, Longman. Handbook of Chemistry and Physics, 52nd edition 1971, Chemical Rubber Company. International Critical Tables. National Research Council, McGraw-Hill. Zahlenwerte und Funktionen aus Physik; Chemie; Astronomie; Geophysik and Technik. Landolt and Bornstein, Springer-verlag.

Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results (rev. Ed. )
Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results (rev. Ed. )

Author: Barry N. Taylor

Publisher: DIANE Publishing

Published: 2009-11

Total Pages: 25

ISBN-13: 1437915566

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Results of measurements and conclusions derived from them constitute much of the technical information produced by the National Institute of Standards and Technology (NIST). In July 1992 the Director of NIST appointed an Ad Hoc Committee on Uncertainty Statements and charged it with recommending a policy on this important topic. The Committee concluded that the CIPM approach could be used to provide quantitative expression of measurement that would satisfy NIST¿s customers¿ requirements. NIST initially published a Technical Note on this issue in Jan. 1993. This 1994 edition addresses the most important questions raised by recipients concerning some of the points it addressed and some it did not. Illustrations.

Units of Measurement
Units of Measurement

Author: S. V. Gupta

Publisher: Springer Nature

Published: 2020-06-23

Total Pages: 317

ISBN-13: 3030439690

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This book delivers a comprehensive overview of units of measurement. Beginning with a historical look at metrology in Ancient India, the book explains fundamental concepts in metrology such as basic, derived and dimensionless quantities, and introduces the concept of quantity calculus. It discusses and critically examines various three and four-dimensional systems of units used both presently and in the past, while explaining why only four base units are needed for a system of measurement. It discusses the Metre Convention as well as the creation of the International Bureau of Weights and Measures, and gives a detailed look at the evolution of the current SI base units of time, length, mass, electric current, temperature, intensity of illumination and substance. This updated second edition is extended with timely new chapters discussing past efforts to redefine the SI base units as well as the most recent 2019 redefinitions based entirely on the speed of light and other fundamental physical constants. Additionally, it provides biographical presentations of many of the historical figures behind commonly used units of measurements, such as Newton, Joule and Ohm, With its accessible and comprehensive treatment of the field, together with its unique presentation of the underlying history, this book is well suited to any student and researcher interested in the practical and historical aspects of the field of metrology.

Metrology and Physical Constants
Metrology and Physical Constants

Author: A. Di Giuseppe

Publisher: IOS Press

Published: 2013-10-21

Total Pages: 567

ISBN-13: 1614993262

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The reliability and accuracy of systems of measurement continue to advance. We are about to enter a period of the most stable measurement system we can imagine with the anticipated new definitions of the SI units of measurement; a direct link between fundamental physics and metrology which will eliminate the current definition of the kilogram, until now based upon an artifact. This book presents selected papers from Course 185 of the Enrico Fermi International School of Physics, held in Varenna, Italy, in July 2012 and jointly organized with the Bureau International des Poids et Mesures (BIPM). The papers delivered at the school covered some of the most advanced topics in the discipline of metrology, including nano-technologies; quantum information and quantum devices; biology and medicine; food; surface quality; ionising radiation for health, environment, art and archaeology; and climate. The continuous and striking advances in basic research concerning atomic frequency standards operating both in the visible range and at microwave levels and the applications to satellite systems are also considered, in the framework of a historical review of the international organization of metrology, as are the problems inherent in uncertainty statements and definitions. This book will be of interest to all those whose work involves scientific measurement at the highest levels of accuracy.

The Theory of Atomic Structure and Spectra
The Theory of Atomic Structure and Spectra

Author: Robert D. Cowan

Publisher: Univ of California Press

Published: 2023-11-15

Total Pages: 752

ISBN-13: 0520906152

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Both the interpretation of atomic spectra and the application of atomic spectroscopy to current problems in astrophysics, laser physics, and thermonuclear plasmas require a thorough knowledge of the Slater-Condon theory of atomic structure and spectra. This book gathers together aspects of the theory that are widely scattered in the literature and augments them to produce a coherent set of closed-form equations suitable both for computer calculations on cases of arbitrary complexity and for hand calculations for very simple cases.