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K E N D
K E N D

Physics (SPA)
Physics (SPA)

... governed by a few special rules or laws that can be expressed in mathematical formulae. Newton’s combination of logical experimentation and mathematical analysis shaped the way science has been done ever since. In this section, we begin by examining kinematics, which is a study of motion without reg ...
Mechanics II - Thierry Karsenti
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Effective field theory methods applied to the 2-body

... The existence of gravitational waves (GW) is an unavoidable prediction of General Relativity (GR): any change to a gravitating source must be communicated to distant observers no faster than the speed of light, c, leading to the existence of gravitational radiation, or GWs. The more precise evidence ...
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... “hierarchical structure formation.” During the epoch of inflation, quantum mechanical effects manifested themselves as very tiny density perturbations in an otherwise homogeneous universe. As the universe expanded these perturbations grew via gravitational instability and eventually became gravitati ...
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Q1. A small mass is situated at a point on a line joining two large

... Failure to realise that a negatively charged electron has an associated negative value of electric potential caused many candidates to go wrong in this question. As in gravitation, the force between an electron and a proton is attractive and so the potential is negative. 40% of the candidates made t ...
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GOVIND VIDYALAYA TAMULIA

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The Discovery of Subatomic Particles

... charge of the body. These terms are the ones that are still in general use today. Franklin also introduced the fundamental hypothesis of the conservation of charge. Electricity is never created or destroyed, but only transferred. Hence, when a glass rod is rubbed with silk, the positive electric cha ...
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Negative mass

In theoretical physics, negative mass is a hypothetical concept of matter whose mass is of opposite sign to the mass of normal matter, e.g. −2 kg. Such matter would violate one or more energy conditions and show some strange properties, stemming from the ambiguity as to whether attraction should refer to force or the oppositely oriented acceleration for negative mass. It is used in certain speculative theories, such as on the construction of wormholes. The closest known real representative of such exotic matter is a region of pseudo-negative pressure density produced by the Casimir effect. Although general relativity well describes gravity and the laws of motion for both positive and negative energy particles, hence negative mass, it does not include the other fundamental forces. On the other hand, although the Standard Model well describes elementary particles and the other fundamental forces, it does not include gravity, even though gravity is intimately involved in the origin of mass and inertia. A model that explicitly includes gravity along with the other fundamental forces may be needed for a better understanding of the concept of negative mass.
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