Gravitational

A nonmathematical 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.
219p nguyenhuucanh1212 23012013 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.
128p camnhung_1 13122012 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....
129p camnhung_1 13122012 35 3 Download

Based on an extended spacetime 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 spacetime 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 timespace curvatures.
9p thuyliebe 09102018 20 0 Download

We study the gravitational wave emission of equalmass 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 quasicircular 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.
10p thuyliebe 09102018 18 0 Download

In this paper, based on the vector model for gravitational field we deduce an equation to determinate the metric of spacetime. This equation is similar to equation of Einstein. The metric of spacetime 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.
10p nguyenxuankha_bevandan 14082020 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.
223p bautroibinhyen19 02032017 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.
14p thieulam5782 04102015 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.
242p bautroibinhyen19 24022017 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.
352p bautroibinhyen19 02032017 39 4 Download

Gravitation, cosmology, and cosmicray 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.
188p camnhung_1 13122012 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
16p transang7 10012013 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.
475p nguyenhuucanh1212 23012013 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...
11p hoami_2511 21102011 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.
443p window1234 02012013 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
7p phalinh19 19082011 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).
7p phalinh19 20082011 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.
6p sansan2 26052018 7 1 Download

This textbook offers a succinct and selfcontained 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.
295p bachduong1311 07122012 27 0 Download

The scattering amplitudes for two spineless particles colliding at Planckian centerofmass 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.
7p truongtien_09 08042018 17 0 Download