Download or read book On the Constitution of Atoms and Molecules Binding of electrons by positive nuclei no 151 p 1 25 July 1913 written by Niels Henrik David Bohr and published by . This book was released on 1913 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: The leap of intuition that initiated quantum mechanics of the atom. The work of Planck and Einstein had shown that light comes out in discrete bundles of energy, so Bohr made the assumption that the orbits of the electron in the atom could have only certain energies and that the light emitted could have only the difference in energy when the electron fell from an outer to an inner orbit. Such a model is completely outside any possible classical physics, but it worked. The calculated energies of the light fit the spectral lines that were emitted.
Download or read book On the Constitution of Atoms and Molecules written by Niels Bohr and published by . This book was released on 1963 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On the Constitution of Atoms and Molecules Systems containing several nuclei no 155 p 857 875 written by Niels Henrik David Bohr and published by . This book was released on 1913 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: The leap of intuition that initiated quantum mechanics of the atom. The work of Planck and Einstein had shown that light comes out in discrete bundles of energy, so Bohr made the assumption that the orbits of the electron in the atom could have only certain energies and that the light emitted could have only the difference in energy when the electron fell from an outer to an inner orbit. Such a model is completely outside any possible classical physics, but it worked. The calculated energies of the light fit the spectral lines that were emitted.
Download or read book Golden Age Of Theoretical Physics The Boxed Set Of 2 Vols written by Jagdish Mehra and published by World Scientific. This book was released on 2001-02-28 with total page 1436 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Golden Age of Theoretical Physics brings together 37 selected essays. Many of these essays were first presented as lectures at various universities in Europe and the USA, and then published as reports or articles. Their enlarged, final versions were published in the joint work of Jagdish Mehra and Helmut Rechenberg, The Historical Development of Quantum Theory, while the other essays were published as articles in scientific journals or in edited books. Here they are published together as a tribute to the Mehra-Rechenberg collaboration sustained for several decades, and cover various aspects of quantum theory, the special and general theories of relativity, the foundations of statistical mechanics, and some of their fundamental applications. Two essays, ‘Albert Einstein's “First” Paper’ (Essay 1) and ‘The Dream of Leonardo da Vinci’ (Essay 37), lie outside the major themes treated in this book, but are included here because of their historical interest. The origin of each essay is explained in a footnote.This book deals with the most important themes developed in the first 40 years of the twentieth century by some of the greatest pioneers and architects of modern physics. It is a vital source of information about what can veritably be described as ‘the golden age of theoretical physics’.
Download or read book Mathematics in the Modern World written by and published by San Francisco : W. H. Freeman. This book was released on 1968 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On the Constitution of Atoms and Molecules Systems containing only a single neceus no 153 p 476 502 Sept 1913 written by Niels Henrik David Bohr and published by . This book was released on 1913 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: The leap of intuition that initiated quantum mechanics of the atom. The work of Planck and Einstein had shown that light comes out in discrete bundles of energy, so Bohr made the assumption that the orbits of the electron in the atom could have only certain energies and that the light emitted could have only the difference in energy when the electron fell from an outer to an inner orbit. Such a model is completely outside any possible classical physics, but it worked. The calculated energies of the light fit the spectral lines that were emitted.
Download or read book The Strange Story of the Quantum written by Banesh Hoffmann and published by Courier Corporation. This book was released on 1959-01-01 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: This timeless exploration of the work of the great physicists of the early 20th century employs analogies, examples, and imaginative insights rather than computations to explain the dramatic impact of quantum physics on classical theory. Topics include Pauli's exclusion principle, Schroedinger's wave equation, Heisenberg's uncertainty principle, and many other concepts. 1959 edition.
Download or read book Pathways to Modern Chemical Physics written by Salvatore Califano and published by Springer Science & Business Media. This book was released on 2012-05-26 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this historical volume Salvatore Califano traces the developments of ideas and theories in physical and theoretical chemistry throughout the 20th century. This seldom-told narrative provides details of topics from thermodynamics to atomic structure, radioactivity and quantum chemistry. Califano’s expertise as a physical chemist allows him to judge the historical developments from the point of view of modern chemistry. This detailed and unique historical narrative is fascinating for chemists working in the fields of physical chemistry and is also a useful resource for science historians who will enjoy access to material not previously dealt with in a coherent way.
Download or read book Biochar for Environmental Management written by Dr. Johannes Lehmann and published by Earthscan. This book was released on 2009 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Biochar is the carbon-rich product when biomass (such as wood, manure, or crop residues) is heated in a closed container with little or no available air. It can be used to improve agriculture and the environment in several ways, and its stability in soil and superior nutrient-retention properties make it an ideal soil amendment to increase crop yields. In addition to this, biochar sequestration, in combination with sustainable biomass production, can be carbon-negative and therefore used to actively remove carbon dioxide from the atmosphere, with major implications for mitigation of climate change. Biochar production can also be combined with bioenergy production through the use of the gases that are given off in the pyrolysis process.This book is the first to synthesize the expanding research literature on this topic. The book's interdisciplinary approach, which covers engineering, environmental sciences, agricultural sciences, economics and policy, is a vital tool at this stage of biochar technology development. This comprehensive overview of current knowledge will be of interest to advanced students, researchers and professionals in a wide range of disciplines"--Provided by publisher.
Download or read book Niels Bohr and the Quantum Atom written by Helge Kragh and published by OUP Oxford. This book was released on 2012-05-03 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Niels Bohr and the Quantum Atom is the first book that focuses in detail on the birth and development of Bohr's atomic theory and gives a comprehensive picture of it. At the same time it offers new insight into Bohr's peculiar way of thinking, what Einstein once called his 'unique instinct and tact'. Contrary to most other accounts of the Bohr atom, the book presents it in a broader perspective which includes the reception among other scientists and the criticism launched against it by scientists of a more conservative inclination. Moreover, it discusses the theory as Bohr originally conceived it, namely, as an ambitious theory covering the structure of atoms as well as molecules. By discussing the theory in its entirety it becomes possible to understand why it developed as it did and thereby to use it as an example of the dynamics of scientific theories.
Download or read book Ludwig Boltzmann written by Carlo Cercignani and published by OUP Oxford. This book was released on 2006-01-12 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the life and personality, the scientific and philosophical work of Ludwig Boltzmann, one of the great scientists who marked the passage from 19th- to 20th-Century physics. His rich and tragic life, ending by suicide at the age of 62, is described in detail. A substantial part of the book is devoted to discussing his scientific and philosophical ideas and placing them in the context of the second half of the 19th century. The fact that Boltzmann was the man who did most to establish that there is a microscopic, atomic structure underlying macroscopic bodies is documented, as is Boltzmann's influence on modern physics, especially through the work of Planck on light quanta and of Einstein on Brownian motion. Boltzmann was the centre of a scientific upheaval, and he has been proved right on many crucial issues. He anticipated Kuhn's theory of scientific revolutions and proposed a theory of knowledge based on Darwin. His basic results, when properly understood, can also be stated as mathematical theorems. Some of these have been proved: others are still at the level of likely but unproven conjectures. The main text of this biography is written almost entirely without equations. Mathematical appendices deepen knowledge of some technical aspects of the subject.
Download or read book Otto Hahn and the Rise of Nuclear Physics written by W.R. Shea and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: and less as the emanation unden\'ent radioactive decay, and it became motion less after about 30 seconds. Since this process was occurring very rapidly, Hahn and Sackur marked the position of the pointer on a scale with pencil marks. As a timing device they used a metronome that beat out intervals of approximately 1. 3 seconds. This simple method enabled them to determine that the half-life of the emanations of actinium and emanium were the same. Although Giesel's measurements had been more precise than Debierne's, the name of actinium was retained since Debierne had made the discovery first. Hahn now returned to his sample of barium chloride. He soon conjectured that the radium-enriched preparations must harbor another radioactive sub stance. The liquids resulting from fractional crystallization, which were sup posed to contain radium only, produced two kinds of emanation. One was the long-lived emanation of radium, the other had a short life similar to the emanation produced by thorium. Hahn tried to separate this substance by adding some iron to the solutions that should have been free of radium, but to no avail. Later the reason for his failure became apparent. The element that emitted the thorium emanation was constantly replenished by the ele ment believed to be radium. Hahn succeeded in enriching a preparation until it was more than 100,000 times as intensive in its radiation as the same quantity of thorium.
Download or read book Introductory Nuclear Physics written by Kenneth S. Krane and published by John Wiley & Sons. This book was released on 1991-01-16 with total page 869 pages. Available in PDF, EPUB and Kindle. Book excerpt: INTRODUCTORY NUCLEAR PHYSICS
Download or read book Cells and Tissues in Culture Methods Biology and Physiology written by E. N. Willmer and published by Elsevier. This book was released on 2013-10-02 with total page 843 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cells and Tissues in Culture: Methods, Biology, and Physiology, Volume 3 focuses on the applications of the methods of tissue culture to various fields of investigation, including virology, immunology, and preventive medicine. The selection first offers information on molecular organization of cells and tissues in culture and tissue culture in radiobiology. Topics include cellular organization at the molecular level, fibrogenesis in tissue culture, effect of radiation on the growth of isolated cells, and irradiation of the selected parts of the cell. The publication then considers the effects of invading organisms on cells and tissues in culture and cell, tissue, and organ cultures in virus research. The book elaborates on antibody production in tissue culture and tissue culture in pharmacology. Discussions focus on early attempts at in vitro studies, tissue culture in the study of pharmacologically active agents, and methods of assessment of drug activity. The text also reviews invertebrate tissue and organ culture in cell research; introduction and methods employed in plant tissue culture; and growth, differentiation and organogenesis in plant tissue and organ cultures. The selection is a vital source of data for readers interested in the culture of cells and tissues.
Download or read book Physics for Scientists and Engineers written by Paul M. Fishbane and published by . This book was released on 1996 with total page 1280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Emperor of All Maladies written by Siddhartha Mukherjee and published by Simon and Schuster. This book was released on 2011-08-09 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: Winner of the Pulitzer Prize and a documentary from Ken Burns on PBS, this New York Times bestseller is “an extraordinary achievement” (The New Yorker)—a magnificent, profoundly humane “biography” of cancer—from its first documented appearances thousands of years ago through the epic battles in the twentieth century to cure, control, and conquer it to a radical new understanding of its essence. Physician, researcher, and award-winning science writer, Siddhartha Mukherjee examines cancer with a cellular biologist’s precision, a historian’s perspective, and a biographer’s passion. The result is an astonishingly lucid and eloquent chronicle of a disease humans have lived with—and perished from—for more than five thousand years. The story of cancer is a story of human ingenuity, resilience, and perseverance, but also of hubris, paternalism, and misperception. Mukherjee recounts centuries of discoveries, setbacks, victories, and deaths, told through the eyes of his predecessors and peers, training their wits against an infinitely resourceful adversary that, just three decades ago, was thought to be easily vanquished in an all-out “war against cancer.” The book reads like a literary thriller with cancer as the protagonist. Riveting, urgent, and surprising, The Emperor of All Maladies provides a fascinating glimpse into the future of cancer treatments. It is an illuminating book that provides hope and clarity to those seeking to demystify cancer.
Download or read book Radioactivity Radionuclides Radiation written by Joseph Magill and published by Springer Science & Business Media. This book was released on 2004-10-14 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offers basic data on more than 3,600 radionuclides. Emphasizes practical application such as basic research, acheo0logy and dating, medical radiology and industrial. Balanced and informative details on the biological effects of radiation and resultant controversy. Trimmed down student version of a product that costs many times the price.
