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Energy condition. In relativistic classical field theories of gravitation, particularly general relativity, an energy condition is a generalization of the statement "the energy density of a region of space cannot be negative" in a relativistically phrased mathematical formulation. There are multiple possible alternative ways to express such a ...
The paradox of a charge in a gravitational field is an apparent physical paradox in the context of general relativity. A charged particle at rest in a gravitational field, such as on the surface of the Earth, must be supported by a force to prevent it from falling. According to the equivalence principle, it should be indistinguishable from a ...
energy 1. A game mechanic using a character resource-pool which governs how often the character is allowed to use a special ability. 2. How often a player is allowed to play a particular free-to-play game; energy can be replenished instantly with an in-app purchase, or replenished slowly by waiting and not playing the game. 3.
Matthew Trammell of The Fader gave the song a negative review, saying Minaj delivers "sleepy lines" and comes off "a bit desperate". Commercial performance "Only" debuted at number 54 on the US Billboard Hot 100, and peaked at number 12 on the chart. On the week ending December 14, 2014 the song rose from number ten to one on the Hot R&B/Hip ...
In particle physics, every type of particle of "ordinary" matter (as opposed to antimatter) is associated with an antiparticle with the same mass but with opposite physical charges (such as electric charge ). For example, the antiparticle of the electron is the positron (also known as an antielectron). While the electron has a negative electric ...
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 ...
2. The positron or antielectron is the particle with an electric charge of +1 e, a spin of 1/2 (the same as the electron), and the same mass as an electron. It is the antiparticle ( antimatter counterpart) of the electron. When a positron collides with an electron, annihilation occurs. If this collision occurs at low energies, it results in the ...
The growth rates of solar and wind energy may have taken to the sky, but renewables alone won't stop climate change. Source: NASA. Renewable energy installations have soared in recent years. Wind ...