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Gravitational energy, or gravitational potential energy, is the potential energy a massive object has because it is within a gravitational field. In classical mechanics, two or more masses always have a gravitational potential. Conservation of energy requires that this gravitational field energy is always negative, so that it is zero when the ...
In physical cosmology and astronomy, dark energy is an unknown form of energy that affects the universe on the largest scales. Its primary effect is to drive the accelerating expansion of the universe. Assuming that the lambda-CDM model of cosmology is correct, [ 1] dark energy is the dominant component of the universe, contributing 68% of the ...
Free energy suppression (or new energy suppression) is a conspiracy theory that technologically viable, pollution-free, no-cost energy sources are being suppressed by governments, corporations, or advocacy groups. [1] [2] Devices allegedly suppressed include perpetual motion machines, cold fusion generators, torus -based generators, reverse ...
e. The triboelectric effect (also known as triboelectricity, triboelectric charging, triboelectrification, or tribocharging) describes electric charge transfer between two objects when they contact or slide against each other. It can occur with different materials, such as the sole of a shoe on a carpet, or between two pieces of the same material.
Virtual particle. A virtual particle is a theoretical transient particle that exhibits some of the characteristics of an ordinary particle, while having its existence limited by the uncertainty principle, which allows the virtual particles to spontaneously emerge from vacuum at short time and space ranges. [ 1]
Atmospheric electricity describes the electrical charges in the Earth's atmosphere (or that of another planet ). The movement of charge between the Earth's surface, the atmosphere, and the ionosphere is known as the global atmospheric electrical circuit. Atmospheric electricity is an interdisciplinary topic with a long history, involving ...
The zero-energy universehypothesis proposes that the total amount of energyin the universeis exactly zero: its amount of positive energy in the form of matteris exactly canceled out by its negative energyin the form of gravity.[1] Some physicists, such as Lawrence Krauss, Stephen Hawkingor Alexander Vilenkin, call or called this state "a ...
July 11, 2024 at 6:12 PM. HOUSTON (AP) — About half a million Houston-area homes and businesses will still be without electricity next week, the city's largest utility said Thursday, stoking the ...