momentum energy
41Flywheel energy storage — NASA G2 flywheel Flywheel energy storage (FES) works by accelerating a rotor (flywheel) to a very high speed and maintaining the energy in the system as rotational energy. When energy is extracted from the system, the flywheel s rotational speed… …
42Specific orbital energy — In the gravitational two body problem, the specific orbital energy (or vis viva energy) of two orbiting bodies is the constant sum of their mutual potential energy ( ) and their total kinetic energy ( ), divided by the reduced mass. According to… …
43Crystal momentum — In solid state physics crystal momentum or quasimomentum[1] is a momentum like vector associated with electrons in a crystal lattice. It is defined by the associated wave vectors k of this lattice, according to (where is the reduced Planck s… …
44SSME energy and power relationships — The Space Shuttle main engines are rockets that use liquid hydrogen and oxygen propellants. The ejection of propellants represents a “flow” of momentum; as a consequence of the law of conservation of momentum an equal and opposite force and… …
45Missing energy — In experimental particle physics, missing energy refers to energy which is not detected in a particle detector, but is not expected due to the laws of Conservation of Mass and Conservation of Momentum. The laws of Conservation of Mass and… …
46Angular momentum operator — In quantum mechanics, the angular momentum operator is an operator analogous to classical angular momentum. The angular momentum operator plays a central role in the theory of atomic physics and other quantum problems involving rotational… …
47Center of momentum frame — A center of momentum frame (or zero momentum frame, or COM frame) of a system is any inertial frame in which the center of mass is at rest (has zero velocity). Note that the center of momentum of a system is not a location, but rather defines a… …
48Electromagnetic stress-energy tensor — In physics, the electromagnetic stress energy tensor is the portion of the stress energy tensor due to the electromagnetic field. Definition In free space in SI units, the electromagnetic stress energy tensor is:T^{mu u} = frac{1}{mu 0} [ F^{mu… …
49Gravitational energy — is the energy associated with the gravitational field.According to classical mechanics, between two or more masses (or other forms of energy momentum) a gravitational potential energy exists. Conservation of energy requires that this… …
50High energy X-rays — or HEX rays are very hard X rays, with 80 keV 1000 keV typically one order of magnitude higher in energy than conventional X rays (and well into the gamma ray energies of over 120 keV). They are produced at modern synchrotron radiation sources… …
