Gravitational physics

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  • The Committee on Gravitational Physics (CGP) was organized by the National Research Council’s (NRC’s) Board on Physics and Astronomy (BPA) as part of the decadal survey Physics in a New Era. The committee’s main charges were (1) to assess the achievements in gravitational physics over the last decade and (2) to identify the most promising opportunities for research in the next decade and describe the resources necessary to realize those opportunities. This report fulfills those charges.

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  • The Committee on Gravitational Physics (CGP) was organized by the National Research Council’s (NRC’s) Board on Physics and Astronomy (BPA) as part of the decadal survey Physics in a New Era. The committee’s main charges were (1) to assess the achievements in gravitational physics over the last decade and (2) to identify the most promising opportunities for research in the next decade and describe the resources necessary to realize those opportunities. This report fulfills those charges....

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  • Dramatic progress has been made in all branches of physics since the National Research Council's 1986 decadal survey of the field. The Physics in a New Era series explores these advances and looks ahead to future goals. The series includes assessments of the major subfields and reports on several smaller subfields, and preparation has begun on an overview volume on the unity of physics, its relationships to other fields, and its contributions to national needs.

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  • A non-mathematical presentation has necessary limitations; and the reader who wishes to learn how certain exact results follow from Einstein's, or even Newton's, law of gravitation is bound to seek the reasons in a mathematical treatise. But this limitation of range is perhaps less serious than the limitation of intrinsic truth. There is a relativity of truth, as there is a relativity of space.|

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  • The author in this work endeavours to solve the greatest scientific problem that has puzzled scientists for the past two hundred years. The question has arisen over and over again, since the discovery of universal gravitation by Sir Isaac Newton, as to what is the physical cause of the attraction of gravitation. “Action at a distance” has long ceased to be recognized as a possible phenomenon, although up to the present, the medium and method of gravitational attraction have not yet been discovered.

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  • (bq) Ebook Physical science: Forces and Motion helps you know How do balanced forces affect the motion of an object? Explain how the Moon’s gravitational pull can be observed on Earth; How is instantaneous speed different from average speed? It is necessary to have a frame of reference to describe motion.

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  • There is no gravitational pull . . . only a push! This hypothesis provides a general model for the mechanics of gravitation. It in no way refutes the observed behavior of gravitation, but merely seeks to explain it. I have based all but a single aspect of this model on established scientific knowledge, and that single aspect is my prediction of an unknown. (So it remains to be proved or disproved.) The team of medieval physicists stepped out of the time machine and began to examine the strange, new device fastened to the window. They had never before seen a...

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  • Special and general relativity are the theories describing the physics of space and time. Space and time are explored with clocks and electromagnetic signals. Therefore, special and general relativity are related to precise clocks and the thorough understanding of signal propagation. The ever-increasing accuracy of clocks together with novel methods for precision time transfer and clock synchronization are pivotal for the new generation of experiments probing the validity of Einstein’s theories from subatomic distances to cosmic scales....

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  • John Archibald Wheeler was born on July 9, 1911, in Jacksonville, Florida, and passed away on April 13, 2008, in Hightstown, New Jersey; his influence on gravitational physics and science in general will remain forever. Among his many and important contributions to physics, he was one of the fathers of the renaissance of General Relativity.

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  • Orbis Scientiae 1999 constitutes the 28th conference on High Energy Physics and Cosmology that were begun in 1964. It has now become an institution by itself under the aegis of which the physicists convene annually in South Florida. It created a Belle Époque in Coral Gables. The series of Orbis Scientiae started with the participants of highest distinction in physics of the 20th Century. After its first two decades the conferences have been placed in the hands of younger and promising physicists....

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  • The history of science shows many close connections between physics and astronomy. It is well known that a number of physical laws evolved from a base of astronomical observations. For example, Kepler observed and, later Newton derived, the laws of gravitation while studying the motion of planets and their satellites. The existence of thermonuclear energy was solidly established when it explained the energy balance of the Sun and stars.

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  • Gravitation, cosmology, and cosmic-ray physics are often regarded as subfields of astrophysics, as well as physics, because they are practiced by using physical techniques in an astronomical setting. However, this report makes no pretense of surveying all of astrophysics; that enormous task was excellently done by the Astronomy Survey Committee (George B. Field, chairman). Their report, Astronomy and Astrophysics for the 1980's (National Academy Press, Washington, D.C., 1982), has been widely circulated, and its recommendations are currently being considered and implemented.

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  • The author in this work endeavours to solve the greatest scientific problem that has puzzled scientists for the past two hundred years. The question has arisen over and over again, since the discovery of universal gravitation by Sir Isaac Newton, as to what is the physical cause of the attraction of gravitation. “Action at a distance” has long ceased to be recognized as a possible phenomenon, although up to the present, the medium and method of gravitational attraction have not yet been discovered.

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  • In July of 1994, Comet Shoemaker-Levy struck the planet Jupiter, depositing 7 × 1022 joules of energy, and incidentally giving rise to a series of Hollywood movies in which our own planet is threatened by an impact by a comet or asteroid. There is evidence that such an impact caused the extinction of the dinosaurs. Left: Jupiter’s gravitational force on the near side of the comet was greater than on the far side, and this difference in force tore up the comet into a string of fragments.

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  • This textbook offers a succinct and self-contained introduction into general relativity and its main areas of application: compact objects, gravitational waves and cosmology. It has evolved from lecture courses I have taught at the University of Utrecht since 1990. The book is intended for advanced undergraduate and beginning graduate students in physics and astrophysics. The past decades have seen spectacular new developments in our knowledge of cosmology, the physics of compact objects and in high precision gravity experiments.

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  • Institute for Theoretical Physics University of California Santa Barbara, CA 93106 carroll@itp.ucsb.edu December 1997 Abstract These notes represent approximately one semester’s worth of lectures on introductory general relativity for beginning graduate students in physics. Topics include manifolds, Riemannian geometry, Einstein’s equations, and three applications: gravitational radiation, black holes, and cosmology. Individual chapters, and potentially updated versions, can be found at http://itp.ucsb.edu/~carroll/notes/. NSF-ITP/97-147 gr-qc/9712019 .i Table of Contents 0.

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