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The form of the "Z" symbol is a reproduction of the Latin letter Z, identical also to a capital Greek zeta. The "Z" symbol is used instead of the equivalent Cyrillic letter З (Ze) used in the Russian alphabet, which has been described as peculiar, considering the symbol's later association with Russian nationalism and pro-Putin politics. [27]
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In chemistry, the letter Z is used to denote the Atomic number of an element (number of protons), such as Z=3 for Lithium. In electrical engineering, Z is used to denote electrical impedance. In astronomy, z is a dimensionless quantity representing redshift. In nuclear physics, Z denotes the atomic number and Z 0 denotes a Z boson.
This subscripted notation, which is endorsed in official SI literature, [13] has the same form as related electromagnetic constants: namely, μ 0 for the vacuum permeability or magnetic constant, ε 0 for the vacuum permittivity or electric constant, and Z 0 for the impedance of free space. This article uses c exclusively for the speed of light ...
A few ships (APL since 2007, [44] Carrier53 since 2022 [45]) can carry 53 foot containers. 40 foot containers are the primary container size, making up about 90% of all container shipping and since container shipping moves 90% of the world's freight, over 80% of the world's freight moves via 40 foot containers.
Bobby Rahal, driving a "Chevy-A" won the 1992 CART championship, the fifth consecutive (and final) for the 265-A. Al Unser Jr. won the 1992 Indianapolis 500 driving a "Chevy-A", also the fifth consecutive (and final) Indy 500 win for the 265-A. Emerson Fittipaldi drove a "Chevy-B" to 4th place in points, but both he and Mears dropped out of ...
Berths are either general or specific to the types of vessel that use them. The size of the berths varies from 5–10 m (16–33 ft) for a small boat in a marina to over 400 m (1,300 ft) for the largest tankers. The rule of thumb is that the length of a berth should be roughly 10% longer than the longest vessel to be moored at the berth.
U-995, a typical VIIC/41 U-boat on display at the Laboe Naval Memorial. U-boats were naval submarines operated by Germany, particularly in the First and Second World Wars. The term is an anglicized version of the German word U-Boot ⓘ, a shortening of Unterseeboot (under-sea boat), though the German term refers to any submarine.