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Wyszukujesz frazę "potential energy" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Equalized mass can explain the dark energy or missing mass problem as higher density of matter in stars amplifies their attraction
Autorzy:
Czajko, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/1179255.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Equalized mass; complete total potential energy; dark matter/energy; missing mass
Opis:
In order to compare properties of celestial bodies regardless of their motions, their masses, which represent also their energy spent on resistance to forced motions, should be expressed with respect to the same (for all of them) material substance, such as water, for instance. Then their density of matter, which has been defined as the ratio of their actual mass/bulk to an equivalent mass of water, should also be taken into account even in the radial Newtonian law of gravitation. Such an equalized mass adheres to the Newton’s definition of “quantity of matter” as conjoined feature (i.e. product) of matter density and the bulk=mass of the body, even though he has never really operated on the notion so defined. The equalized mass conforms to the Einstein’s concept of mass as equivalent of energy, both of which vary with speed. Hence the product of equalized mass and density of matter can increase the radial gravitational force of very dense stars, easing the problem of the allegedly missing mass that pushes galaxies too far away according to former estimates of their masses and their distances. Besides the equalized mass, the need for which has emerged from presence of nonradial potentials acting along paths on equipotential surfaces in radial/center-bound force fields, the repulsive effects of the nonradial angular potentials can also amplify the regular/innate spins of stars, black holes and galaxies, eliminating thus the need for the so-called dark matter/energy invented just to explain the allegedly missing mass/energy.
Źródło:
World Scientific News; 2017, 80; 207-238
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical study of the effect the hydroxyl subgroups on the electronic properties of iso-indene molecule
Autorzy:
Obayes, Abbas Ibrahim
Hasan, Nahida B.
Aboud, Hamed Ibrahem
Mohammed, Mohammed Ahmed
Powiązania:
https://bibliotekanauki.pl/articles/1191969.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
DFT
energy gap
ionization potential
hardness and IR-spectrum
Opis:
In this work, six molecules model are optimized at B3LYP/6-31G** density functional theory. Electronic properties of iso-indene molecules were investigated depending on the three parameters (B3LYP) by density functional theory method. The best geometry for all molecules were investigated at (6-31G**) basis sets. The total energies, energy gaps, ionization potentials, electron affinities and softness were calculated for the studied molecules. Adding the (OH) ion and Nitrogen, Sulfur atoms to the iso-indene molecules leads to decrease the energy gap and the hardness of the studied molecules. The IR-spectra shows the effect of adding the (OH) ion and Nitrogen, Sulfur atoms in the ring on the vibrations of the reference molecule, the electronic properties and IR spectrum for all molecules were investigated by Gaussian 03 program.
Źródło:
World Scientific News; 2016, 50; 49-63
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and Theoretical Investigation to Study the Molecular Structure, Electronic Properties, UV–Vis Spectra of Coumarin 102
Autorzy:
Mohi, Ali T.
Abood, Tareq H.
Hadi, Hasan A.
Karim, Mahmood S.
Mutlik, Falah A-H.
Alwan, Tariq J.
Powiązania:
https://bibliotekanauki.pl/articles/1178533.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
DFT
Ionization potential
TDDFT
electron affinity
energy gap and UV spectra
Opis:
In this work, we study the structure, electronic properties and electronic spectra of Coumarin 102 (C102) dissolved in ethanol as an experimental-theoretical investigation. The various properties of the ground and excited electronic states of coumarins 102 using density functional theory (DFT) and time-dependent density functional theory (TDDFT) was calculated by the B3LYP density functional model with 6-31G(d,p) basis set by Gaussian 09 W program. Spectral characteristics of coumarin 102 have been probed into by methods of experimental UV-visible, and quantum chemistry. The UV spectrum was measured in Ethanol. The optimized structures, total energies, electronic states (HOMO- LUMO), energy gap, ionization potentials, electron affinities, chemical potential, global hardness, softness, global electrophilictity, dipole moment and electrostatic potential was calculated. were calculated. We find good agreement between experimental data of UV spectrum and TDDFT excitation energies.
Źródło:
World Scientific News; 2017, 70, 2; 216-229
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analytical models for quark stars with electric field
Autorzy:
Malaver, Manuel
Powiązania:
https://bibliotekanauki.pl/articles/1178867.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Einstein-Maxwell system
MIT Bag Model
adjustable parameter
charged quark matter
energy density
gravitational potential
Opis:
We found new class of solutions to the Einstein-Maxwell system of equations for charged quark matter within the framework of MIT Bag Model considering a prescribed form of gravitational potential Z(x) used by Malaver (2016), which depends on an adjustable parameter n. Variables as the energy density, charge density, pressure and the metric functions are written in terms of elementary and polynomial functions. We show that the form chosen for the gravitational potential allows obtain physically acceptable solutions with any value of the adjustable parameter.
Źródło:
World Scientific News; 2017, 89; 39-47
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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