coefficient of heat conduction
71superconductivity — superconduction /sooh peuhr keuhn duk sheuhn/, n. superconductive /sooh peuhr keuhn duk tiv/, superconducting, adj. superconductor /sooh peuhr keuhn duk teuhr/, n. /sooh peuhr kon deuhk tiv i tee/, n. Physics. the phenomenon of almost perfect… …
72Electronic amplifier — A practical amplifier circuit An electronic amplifier is a device for increasing the power of a signal. It does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In… …
73Nuclear meltdown — Three of the reactors at Fukushima I overheated, causing core meltdowns. This was compounded by hydrogen gas explosions and the venting of contaminated steam which released large amounts of radioactive material into the air.[1] …
74Seasonal thermal store — A seasonal thermal store (also known as a seasonal heat store or inter seasonal thermal store) is a store designed to retain heat deposited during the hot summer months for use during colder winter weather. The heat is typically captured using… …
75nuclear reactor — Physics. reactor (def. 4). Also called nuclear pile. [1940 45] * * * Device that can initiate and control a self sustaining series of nuclear fission reactions. Neutrons released in one fission reaction may strike other heavy nuclei, causing them …
76Copper wire and cable — Copper has been used in electric wiring since the invention of the electromagnet and the telegraph in the 1820s.[1][2] The invention of the telephone in 1876 proved to be another early boon for copper wire.[3] Today, despite competition from… …
77Phénomène de transfert — Un phénomène de transfert (ou phénomène de transport) est un phénomène irréversible durant lequel une grandeur physique est transportée par le biais de molécules[1]. C est un phénomène transversal présent dans tous les domaines de la science et… …
78Nombre de Nusselt — Le nombre de Nusselt (Nu) est un nombre adimensionnel utilisé dans les opérations de transfert thermique. Il représente le rapport entre le transfert thermique par convection et le transfert par conduction. Si la conduction et la convection sont… …
79Phénomène de transport — Phénomène de transfert Un phénomène de transfert (ou phénomène de transport) est un phénomène irréversible durant lequel une grandeur physique est transportée par le biais de molécules[1]. C est un phénomène transversal présent dans tous les… …
80Partial differential equation — A visualisation of a solution to the heat equation on a two dimensional plane In mathematics, partial differential equations (PDE) are a type of differential equation, i.e., a relation involving an unknown function (or functions) of several… …
