conductor-to-conductor spacing
61Thermodynamic temperature — is the absolute measure of temperature and is one of the principal parameters of thermodynamics. Thermodynamic temperature is an “absolute” scale because it is the measure of the fundamental property underlying temperature: its null or zero point …
62Ladder — A ladder is a vertical or inclined set of rungs or steps. There are two types: rigid ladders that can be leaned against a vertical surface such as a wall, and rope ladders that are hung from the top. The vertical members of a rigid ladder are… …
63Ball grid array — For other uses, see BGA (disambiguation). Intel Embedded Pentium MMX (bottom view) A ball grid array (BGA) is a type of surface mount packaging used for integrated circuits. Contents …
64Polyphase system — A polyphase system is a means of distributing alternating current electrical power. Polyphase systems have three or more energized electrical conductors carrying alternating currents with a definite time offset between the voltage waves in each… …
65Bloch wave — A Bloch wave or Bloch state, named after Felix Bloch, is the wavefunction of a particle (usually, an electron) placed in a periodic potential. It consists of the product of a plane wave envelope function and a periodic function ( periodic Bloch… …
66D-subminiature — DA, DB, DC, DD, and DE sized connectors The D subminiature or D sub is a common type of electrical connector. They are named for their characteristic D shaped metal shield. When they were introduced, D subs were among the smaller connectors used… …
67Argo (oceanography) — Argo is an observation system for the Earth s oceans that provides real time data for use in climate, weather, oceanographic and fisheries research. [ [http://www.aip.org/pt/vol 53/iss 7/p50.html Physics Today: Argo Begins Systematic Global… …
68Crystal 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… …
69Lecher lines — are a form of parallel conductor that can be used at UHF for creating resonant circuits. They are used at frequencies between HF/VHF where lumped components are used, and UHF/SHF where resonant cavities are more practical. Ernst Lecher of Vienna …
70Soil thermal properties — The thermal properties of soil are a component of soil physics that has found important uses in engineering, climatology and agriculture. These properties influence how energy is partitioned in the soil profile. While related to soil temperature …
