angular kinetic energy
51Quantum mechanics — For a generally accessible and less technical introduction to the topic, see Introduction to quantum mechanics. Quantum mechanics …
52Torque — For other uses, see Torque (disambiguation). Classical mechanics Newton s Second Law …
53Fine structure — Interference fringes, showing fine structure (splitting) of a cooled deuterium source, viewed through a Fabry Pérot étalon. In atomic physics, the fine structure describes the splitting of the spectral lines of atoms due to first order… …
54Bicycle performance — Lance Armstrong in a 2004 Tour de France individual time trial …
55radioactivity — /ray dee oh ak tiv i tee/, n. Physics, Chem. the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. Also called activity. [1895… …
56celestial mechanics — the branch of astronomy that deals with the application of the laws of dynamics and Newton s law of gravitation to the motions of heavenly bodies. [1815 25] * * * Branch of astronomy that deals with the mathematical theory of the motions of… …
57nebula — nebular, adj. /neb yeuh leuh/, n., pl. nebulae / lee , luy /, nebulas. 1. Astron. a. Also called diffuse nebula. a cloud of interstellar gas and dust. Cf. dark nebula, emission nebula, reflection nebula …
58Circular motion — Classical mechanics Newton s Second Law History of classical mechanics  …
59Circular orbit — For other meanings of the term orbit , see orbit (disambiguation) A circular orbit is the orbit at a fixed distance around any point by an object rotating around a fixed axis. Below we consider a circular orbit in astrodynamics or celestial… …
60Rydberg Ionization Spectroscopy — Rydberg statesAtoms and molecules have ionization energy thresholds associated with the energy required to remove an electron from the ionic core. (The Rydberg formula describes the energy level series of a Rydberg atom.) Rydberg series describe… …
