centrifugal operator
61Particle in a spherically symmetric potential — In quantum mechanics, the particle in a spherically symmetric potential describes the dynamics of a particle in a potential which has spherical symmetry. The Hamiltonian for such a system has the form:hat{H} = frac{hat{p}^2}{2m 0} + V(r)where m 0 …
62Cotton candy — Candyfloss redirects here. For the novel, see Candyfloss (novel). Spinning cotton candy at a funfair. Cotton candy (U.S., Canada), candy floss or candyfloss (UK, Ireland …
63Continuously variable transmission — Transmission types Manual Sequential manual Non synchronous Preselector Automatic Manumatic Semi automatic Electrohydraulic Dual …
64Jackhammer — A pneumatic drill or jackhammer is a portable percussive drill powered by compressed air. It is used to drill rock, break up pavement, among other applications. It works similar to a hammer and chisel, by jabbing with its bit, not rotating it. (A …
65Sand casting — Sand casting, also known as sand molded casting, is a metal casting process characterized by using sand as the mold material. It is relatively cheap and sufficiently refractory even for steel foundry use. A suitable bonding agent (usually clay)… …
66Hydraulic head — is a specific measurement of water pressure or total energy per unit weight above a geodetic datum. It is usually measured as a water surface elevation, expressed in units of length, but represents the energy at the entrance (or bottom) of a… …
67Gravitron — This article is about the amusement ride. For the hypothetical elementary particle, see graviton. The Gravitron (currently marketed as the Starship 2000) is an amusement ride, most commonly found as a temporary ride. First manufactured by… …
68Leyland Atlantean — The Leyland Atlantean was a model of double decker bus built by Leyland (with bodies added by a variety of companies) in the United Kingdom from 1958 to 1986.It pioneered the design of rear engined, front entrance double deck buses in the UK,… …
69Hit and miss engine — A hit and miss engine is a type of four stroke internal combustion engine that was conceived in the late 1800s and was produced by various companies from the 1890s through approximately the 1930s. The name comes from the method of speed control… …
70Directional boring — A small directional boring unit in action Directional boring, commonly called horizontal directional drilling or HDD, is a steerable trenchless method of installing underground pipes, conduits and cables in a shallow arc along a prescribed bore… …
