Influence of orientation of bar on its mass

Dmitriev, A. L.; Snegov, V. S.

doi:10.1007/bf02506616

Cited by 4 publications

(6 citation statements)

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Section: Tests Of the Universality Of Free Fallmentioning

confidence: 94%

“…The question of whether the gravitational constant G may depend on the temperature can be interpreted as whether kinetic energy falls in a gravitational field in the same way as ordinary matter. This has been discussed by A Dmitriev (St Petersburg) [7]. E Rosenthal (Cornell) together with E E Flanagan examined the generalization of the Hayashi-Shirafuji theory suggested by Mao et al [8] called Einstein-Hayashi-Shirafuji theory.…”

Section: Tests Of the Universality Of Free Fallmentioning

confidence: 98%

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Summary of session C1: experimental gravitation

Lämmerzahl

2008

Class. Quantum Grav.

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The fact that gravity is a metric theory follows from the Einstein equivalence principle. This principle consists of (i) the universality of free fall, (ii) the universality of the gravitational redshift and (iii) the local validity of Lorentz invariance. Many experiments searching for deviations from standard general relativity test the various aspects of the Einstein equivalence principle. Here we report on experiments covering the whole Einstein equivalence principle. Until now all experiments have been in agreement with the Einstein equivalence principle. As a consequence, gravity has to be described by a metric theory. Any metric theory of gravity leads to effects such as perihelion shift, deflection of light, gravitational redshift, gravitational time delay, Lense-Thirring effect, Schiff effect, etc. A particular theory of that sort is Einstein's general relativity. For weak gravitational fields which are asymptotically flat any deviation from Einstein's general relativity can be parametrized by a few constants, the PPN parameters. Many astrophysical observations and space experiments are devoted to a better measurement of the effects and, thus, of the PPN parameters. It is clear that gravity is best tested for intermediate ranges, that is, for distances between 1 m and several astronomical units. It is highly interesting to push forward our domain of experience and to strengthen the experimental foundation of gravity also beyond these scales. This point is underlined by the fact that many quantum gravity and unification-inspired theories suggest deviation from the standard laws of gravity at very small or very large scales. In this session summary we briefly outline the status and report on the talks presented in session C1 about experimental gravitation.

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Section: Tests Of the Universality Of Free Fallmentioning

confidence: 94%

Section: Tests Of the Universality Of Free Fallmentioning

confidence: 98%

Summary of session C1: experimental gravitation

Lämmerzahl

2008

Class. Quantum Grav.

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“…Average relative value δ of mass difference of the rod 150 mm in length, 30 mm diameter and mass of about 476 g measured by vertical and horizontal orientation of the rod is (Dmitriev & Snegov, 1998) Rod weight in vertical position systematically exceeds its weight in horizontal position within measurement errors. It should be noted that decrease of the value of mass (weight) difference during hours close to astronomical noon (about 2.00 p.m. of the standard time at the longitude of Saint Petersburg).…”

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confidence: 90%

“…Dependence of the weight of non-magnetic titanium rod of ВТ1 model from its orientation taking into account influence on the change of some external physical factors has been studied in Dmitriev and Snegov (1998).…”

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confidence: 99%

Gravitational Induction as Analog of Amplification of Light in Active Medium

Dmitriev¹

2017

APR

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Concept of gravitational induction the essence of which is in the change of gravitation force affecting test mass due to influence of gravitational field on this mass by other masses has been considered. Evaluation of coefficient of induced increase of the gravity in the titanium sample has been shown based on the measurement of weight of nonmagnetic metal rod by its vertical and horizontal orientation.Keywords: gravitational field, weight, induction, amplification, acceleration Term "induction" means "pointing, excitation" and in electromagnetic theory, generally, associates with appearance of electromotive force (electric field) in the conductor during change of magnetic flux through the surface limited by this conductor. Following traditional phenomenological approach while describing physical processes it is natural to assume that gravitational interaction of the bodies (masses) is connected to propagation of some disturbances -particles (gravitons etc.) within the space between interacting bodies or waves within etheric environment similar to acoustic and electromagnetic waves. Depending on approved gravitation model velocity of these waves (particles) is within wide range -from single cm/s to the values much more exceeding the velocity of light. At the same time gravitational disturbances produced by interacting masses propagate along the line of mass interaction directed towards each other. Similar to ordinary waves they involve the end space area and in principle should influence the other bodies or particles within the propagation area. Such influence may result in change of the force of gravitational interaction of the bodies analogues to optical phenomena of absorption and amplification of light within absorbing or active (inversion, excited) medium.As shown in Dmitriev (2001), acceleration caused by external, for example, elastic forces (electromagnetic in nature), body movement is accompanied by change of the force of its gravitational interaction with massive body (the Earth). The result of this is dependence of the weight of mechanical rotor with horizontal axis on speed of its rotation as well as orientation dependence of coefficients of restitution during elastic impact of the ball on massive plate. Influence of accelerations of micro-particles on the gravity due to their chaotic thermal motion allows to confirm observed negative temperature dependence of the physical body weight (Dmitriev, Nikushchenko, & Snegov, 2003). Gravitational effect described below may be called the effect of "gravitational induction". Its essence lies in change of the gravity affecting the test body due to gravitational interaction of this body with other foreign bodies.Let's consider the rod with mass m and length 1 l , being placed within homogeneous gravitational field of great mass M, for example the Earth mass, Figure 1. Let's consider the normal acceleration of the gravity along the rod to be constant and equal to 0 g . Intensity of gravitational disturbances around point z of the rod volume, caused by in...

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“…Effects of buoyancy, convection, air currents, influence of external electric and magnetic fields (Raizer, 1991) traditionally explain its characteristic shape. Experimentally proven influence of body temperature on its weight (Dmitriev, Nikushchenko, & Snegov, 2003;Dmitriev, 2008;Dmitriev & Bulgakova, 2013;Dmitriev, 2015) gives the grounds to consider a question of extent of impact of a gravitational field of the Earth on a shape of an electric discharge. High temperatures, till tens of thousands K , in the channel of a free electric discharge at low pressure of about 0.1 atm support it.…”

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confidence: 99%