logarithmic potential
71Entropy — This article is about entropy in thermodynamics. For entropy in information theory, see Entropy (information theory). For a comparison of entropy in information theory with entropy in thermodynamics, see Entropy in thermodynamics and information… …
72Hall effect — For the Colombian band, see The Hall Effect (band). The Hall effect is the production of a voltage difference (the Hall voltage) across an electrical conductor, transverse to an electric current in the conductor and a magnetic field perpendicular …
73Light-emitting diode — LED redirects here. For other uses, see LED (disambiguation). Light emitting diode Red, pure green and blue LEDs of the 5mm diffused type Type Passive, optoelectronic Working principle Electr …
74Pressure measurement — The construction of a bourdon tube gauge, construction elements are made of brass Many techniques have been developed for the measurement of pressure and vacuum. Instruments used to measure pressure are called pressure gauges or vacuum gauges. A… …
75Hilbert–Pólya conjecture — In mathematics, the Hilbert–Pólya conjecture is a possible approach to the Riemann hypothesis, by means of spectral theory.Initial hunchesDavid Hilbert and George Pólya speculated that real number values of t such that : frac12 + it is a zero of… …
76Automatic dependent surveillance-broadcast — (ADS B) is a cooperative surveillance technique for air traffic control and related applications. An ADS B out equipped aircraft determines its own position using a global navigation satellite system and periodically broadcasts this position and… …
77aging — ag·ing (āʹjĭng) n. 1. The process of growing old or maturing. 2. An artificial process for imparting the characteristics and properties of age. * * * Gradual change in an organism that leads to increased risk of weakness, disease, and death. It… …
78Field electron emission — It is requested that a diagram or diagrams be included in this article to improve its quality. For more information, refer to discussion on this page and/or the listing at Wikipedia:Requested images. Field emission (FE) (also known as field… …
79Saffir-Simpson Hurricane Scale — The Saffir Simpson Hurricane Scale is a classification used for most Western Hemisphere tropical cyclones that exceed the intensities of tropical depressions and tropical storms, and thereby become hurricanes. The scale divides hurricanes into… …
80Contact mechanics — Continuum mechanics …
