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Gravitational

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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.|

    pdf219p nguyenhuucanh1212 23-01-2013 35 5   Download

  • 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.

    pdf128p camnhung_1 13-12-2012 33 3   Download

  • 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....

    pdf129p camnhung_1 13-12-2012 35 3   Download

  • Based on an extended space-time symmetry a new attempt to search for links between general relativity and quantum mechanics is proposed. A simplified cylindrical model of gravitational geometrical dynamics leads to a microscopic geodesic description of strongly curved extradimensional space-time which implies a duality between an emission law of microscopic gravitational waves and the quantum mechanical equations of free elementary particles. Consequently, the Heisenberg indeterminism would originate from the time-space curvatures.

    pdf9p thuyliebe 09-10-2018 20 0   Download

  • We study the gravitational wave emission of equal-mass neutron stars in binary orbits as the stars approach the inner most last stable circular orbit. We illustrate the extraction of gravitational wave forms in a sequence of quasi-circular orbit simulations including the general relativistic hydrodynamic response of the stars. We compare the computed results with the Newtonian and post Newtonian results and show that substantial differences can arise as the orbits approach the final inspiral.

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  • In this paper, based on the vector model for gravitational field we deduce an equation to determinate the metric of space-time. This equation is similar to equation of Einstein. The metric of space-time outside a static spherically symmetric body is also determined. It gives a small supplementation to the Schwarzschild metric in General theory of relativity but the singularity does not exist. Especially, this model predicts the existence of a new universal body after a black hole.

    pdf10p nguyenxuankha_bevandan 14-08-2020 5 0   Download

  • (bq) part 2 book "a first course in general relativity" has contents: physics in a curved spacetime, the einstein field equations, gravitational radiation, spherical solutions for stars, schwarzschild geometry and black holes, cosmology.

    pdf223p bautroibinhyen19 02-03-2017 62 6   Download

  • (bq)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.

    pdf14p thieulam5782 04-10-2015 32 5   Download

  • (bq) part 1 book "engineering mechanics statics" has contents: basic concepts, scalars and vectors, law of gravitation, problem solving in statics, rectangular components, equilibrium conditions, equilibrium conditions,...and other contents.

    pdf242p bautroibinhyen19 24-02-2017 43 4   Download

  • (bq) part 1 book "a first course in string theory" has contents: a brief introduction, special relativity and extra dimensions, electromagnetism and gravitation in various dimensions, nonrelativistic strings, the relativistic point particle, relativistic strings,... and other contents.

    pdf352p bautroibinhyen19 02-03-2017 39 4   Download

  • 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.

    pdf188p camnhung_1 13-12-2012 40 3   Download

  • THE transport swung past Centaurus on the last leg of her long journey to Sol. There was no flash, no roar as she swept across the darkness of space. As silent as a ghost, as quiet as a puff of moonlight she moved, riding the gravitational fields that spread like tangled, invisible spider webs between the

    pdf16p transang7 10-01-2013 36 3   Download

  • 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.

    pdf475p nguyenhuucanh1212 23-01-2013 34 3   Download

  • Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí y học Molecular Biology cung cấp cho các bạn kiến thức về ngành sinh học đề tài: Gravitation field algorithm and its application in gene cluster...

    pdf11p hoami_2511 21-10-2011 35 2   Download

  • 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.

    pdf443p window1234 02-01-2013 42 2   Download

  • In this paper, we introduce a vector model to describe gravitational field. The model is based on the assumption that the gravitational mass is Lorentz invariant . We introduce a non- relativistic equation system to describe the gravitational field, then we generalize it to obtain a relativistic equation system . dent

    pdf7p phalinh19 19-08-2011 32 1   Download

  • In this paper, based on the vector model for gravitational field we have found a metric tensor of the space –time that in the first order approximate it lead to the Schwarzschild metric tensor in the General Theory of Relativity(GTR).

    pdf7p phalinh19 20-08-2011 40 1   Download

  • Based on the Earth Gravitational Model EGM2008 with 1minx1min resolution, this paper presents the fitness of the VN2000 datum oriented by using transformation parameters published by the MONRE.

    pdf6p sansan2 26-05-2018 7 1   Download

  • 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.

    pdf295p bachduong1311 07-12-2012 27 0   Download

  • The scattering amplitudes for two spineless particles colliding at Planckian center-ofmass energies are considered by the partial wave method in quantum gravity. In the framework of the partial method, a scheme for finding the leading eikonal scattering amplitudes is developed and constructed. The connection between the solutions obtained by partial wave method, quasipotential and functional approaches is also discussed.

    pdf7p truongtien_09 08-04-2018 17 0   Download

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