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The number 9 is also considered unlucky; when pronounced ku, it is a homophone for suffering (苦). The number 13 is sometimes considered unlucky, though this is a carryover from Western tradition. In contrast, 7 and sometimes 8 are considered lucky in Japanese. [2] In modern Japanese, cardinal numbers except 4 and 7 are generally given the on ...
A larger Nusselt number corresponds to more active convection, with turbulent flow typically in the 100–1000 range. [2] A similar non-dimensional property is the Biot number, which concerns thermal conductivity for a solid body rather than a fluid. The mass transfer analogue of the Nusselt number is the Sherwood number.
The coulomb was originally defined, using the latter definition of the ampere, as 1 A × 1 s. [8] The 2019 redefinition of the ampere and other SI base units fixed the numerical value of the elementary charge when expressed in coulombs and therefore fixed the value of the coulomb when expressed as a multiple of the fundamental charge.
The lumen (symbol: lm) is the unit of luminous flux, a measure of the perceived power of visible light emitted by a source, in the International System of Units (SI). ). Luminous flux differs from power (radiant flux) in that radiant flux includes all electromagnetic waves emitted, while luminous flux is weighted according to a model (a "luminosity function") of the human eye's sensitivity to ...
Inscriptions in medieval Scandinavian runes show a large number of variant rune forms, and some letters, such as s, c, and z often were used interchangeably. [49] [50] Medieval runes were in use until the 15th century. Of the total number of Norwegian runic inscriptions preserved today, most are medieval runes.
Randomly addressable semiconductor memory doubles in size for each address lane added to an integrated circuit package, which favors counts that are powers of two. The capacity of a disk drive is the product of the sector size, number of sectors per track, number of tracks per side, and the number of disk platters in the drive.
Notation for the (principal) square root of x. For example, √ 25 = 5, since 25 = 5 ⋅ 5, or 5 2 (5 squared). In mathematics, a square root of a number x is a number y such that =; in other words, a number y whose square (the result of multiplying the number by itself, or ) is x. [1]
An infomercial is a form of television commercial that resembles regular TV programming [1] yet is intended to promote or sell a product, service or idea. It generally includes a toll-free telephone number or website. [2]