Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Energy gravitational

With the law of gravity, Newton was able to explain why Kepler s laws described the planetary motion. The law of gravity is an example of a central force. The force is directed along the center of mass of two bodies. The mathematical formulation is given as follows  [Pg.66]

Here F is the force between two masses mi and m2 separated by a distance r. The last term r/r builds the unit vector along the distance of the two masses. G is the gravitational constant. The gravitational constant is a constant number. A unit mass that is located on the surface of the earth is subject to an acceleration, i.e., force on the unit mass of g = 9.8 m s. We obtain this by inserting the numerical values of G = 6.6726 X 10 m kg s, mass of earth m2 = 5.98 x 10 kg, and radius of earth r = 6.37 x 10 m. [Pg.66]

Therefore, we obtain for the force of a mass m near the surface of the earth [Pg.66]

In thermodynamics, gravitational work has also been set up with gh as the gravitational potential and dm as the differential form of the extensive variable [7]. Here the preferred form is g as the gravitational potential and d(m/t) as the differential form of the extensive variable. [Pg.66]


See also Conservation of Energy Gravitational Energy Kinetic Energy Nuclear Energ5 ... [Pg.952]

Fig. 5.4. Schematic evolution of the internal structure of a star with 25 times the mass of the Sun. The figure shows the various combustion phases (shaded) and their main products. Between two combustion phases, the stellar core contracts and the central temperature rises. Combustion phases grow ever shorter. Before the explosion, the star has assumed a shell-like structure. The centre is occupied by iron and the outer layer by hydrogen, whilst intermediate elements are located between them. CoUapse followed by rebound from the core generates a shock wave that reignites nuclear reactions in the depths and propels the layers it traverses out into space. The collapsed core cools by neutrino emission to become a neutron star or even a black hole. Most of the gravitational energy liberated by implosion of the core (some 10 erg) is released in about 10 seconds in the form of neutrinos. (Courtesy of Marcel Amould, Universite Libre, Brussels.)... Fig. 5.4. Schematic evolution of the internal structure of a star with 25 times the mass of the Sun. The figure shows the various combustion phases (shaded) and their main products. Between two combustion phases, the stellar core contracts and the central temperature rises. Combustion phases grow ever shorter. Before the explosion, the star has assumed a shell-like structure. The centre is occupied by iron and the outer layer by hydrogen, whilst intermediate elements are located between them. CoUapse followed by rebound from the core generates a shock wave that reignites nuclear reactions in the depths and propels the layers it traverses out into space. The collapsed core cools by neutrino emission to become a neutron star or even a black hole. Most of the gravitational energy liberated by implosion of the core (some 10 erg) is released in about 10 seconds in the form of neutrinos. (Courtesy of Marcel Amould, Universite Libre, Brussels.)...
Apart from this phenomenon, gravitational collapse has another important effect. The tremendously hot neutron star in the making emits a copious supply of thermal neutrinos and antineutrinos. These transfer some 10 erg, that is, almost all the gravitational energy liberated by compaction of part of the original star into a neutron star with mass around 1.5 Mq and radius 10 km. [Pg.147]

Neutrinos are usually evoked as detonators, triggering or driving the explosion of massive stars. The gravitational energy freed by core collapse of a massive star, some 10 erg, is mainly evacuated by neutrinos. These pour out in such inordinate amounts that if just 1% of their energy is communicated to matter in the envelope, the whole thing will be blasted out of existence. [Pg.162]

Froude number (centrifugal/gravitational energy), geometric number (ratio of characteristic lengths). [Pg.203]

C. The Heaviside Energy Flow Component Was Arbitrarily Discarded Proposed Solution for the Dark Matter Gravitational Energy... [Pg.640]

XI. PROPOSED SOLUTION FOR THE DARK MATTER GRAVITATIONAL ENERGY... [Pg.680]


See other pages where Energy gravitational is mentioned: [Pg.240]    [Pg.475]    [Pg.1964]    [Pg.596]    [Pg.597]    [Pg.597]    [Pg.598]    [Pg.646]    [Pg.692]    [Pg.703]    [Pg.1036]    [Pg.1095]    [Pg.1282]    [Pg.1292]    [Pg.136]    [Pg.25]    [Pg.353]    [Pg.415]    [Pg.28]    [Pg.85]    [Pg.159]    [Pg.161]    [Pg.197]    [Pg.198]    [Pg.152]    [Pg.153]    [Pg.156]    [Pg.179]    [Pg.203]    [Pg.425]    [Pg.268]    [Pg.225]    [Pg.24]    [Pg.4]    [Pg.132]    [Pg.133]    [Pg.160]    [Pg.265]    [Pg.427]    [Pg.480]   
See also in sourсe #XX -- [ Pg.596 , Pg.597 ]

See also in sourсe #XX -- [ Pg.59 ]

See also in sourсe #XX -- [ Pg.17 , Pg.18 , Pg.81 , Pg.94 ]

See also in sourсe #XX -- [ Pg.450 , Pg.459 , Pg.465 ]

See also in sourсe #XX -- [ Pg.229 , Pg.279 ]

See also in sourсe #XX -- [ Pg.110 , Pg.311 ]

See also in sourсe #XX -- [ Pg.214 ]

See also in sourсe #XX -- [ Pg.239 , Pg.240 ]




SEARCH



Formulas gravitational potential energy

Gravitation

Gravitational

Gravitational energy force

Gravitational potential energy

© 2024 chempedia.info