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ENIG and ENEPIG are meant to replace the more conventional coatings of solder, such as hot air solder leveling (HASL/HAL). While more expensive and require more processing steps, they have several advantages, including excellent surface planarity (important for ball grid array component mounting), good oxidation resistance, prevents 'copper migration', and suitability for movable contacts such ...
2: [1] 2 Ni 2+ + 8 H 2 PO − 2 + 2 H 2 O → 2 Ni 0 (s) + 6 H 2 PO − 3 + 2 H + + 2 P (s) + 3 H 2 (g) This reaction is catalyzed by some metals including cobalt, palladium, rhodium, and nickel itself. Because of the latter, the reaction is auto-catalytic, and proceeds spontaneously once an initial layer of nickel has formed on the surface. [1 ...
"Numb" by Linkin Park was the first 2000s video predating YouTube to reach 1 billion views in November 2018. [59] "Bohemian Rhapsody" by Queen was the first 1970s video (and pre-1990s video) to reach 1 billion views in July 2019. [60] "Sweet Child o' Mine" by Guns N' Roses was the first 1980s video to reach 1 billion views in October 2019. [61]
This list of most-liked YouTube videos contains the top 30 videos with the most likes of all time, taken directly from the video page. The American video platform YouTube implemented a like and dislike button on these pages in March 2010, part of a major redesign of the site.
Amy Hennig (born August 19, 1964) [1] [2] is an American video game writer and director, formerly for the video game company Naughty Dog.She began her work in the industry on the Nintendo Entertainment System, with her design debut on the Super Nintendo Entertainment System game Michael Jordan: Chaos in the Windy City.
Contra-rotating propellers Contra-rotating propellers on the Rolls-Royce Griffon-powered P-51XR Mustang Precious Metal at the 2014 Reno Air Races. Aircraft equipped with contra-rotating propellers (CRP) [1] coaxial contra-rotating propellers, or high-speed propellers, apply the maximum power of usually a single piston engine or turboprop engine to drive a pair of coaxial propellers in contra ...
The Gregorian antiphon Procedamus In Pace!Cum Angelis.This music, used in "Sadeness", was composed for the Easter liturgy. "Sadeness (Part I)" is a song by German musical project Enigma, released in October 1990 by Virgin Records as the lead single from their first album, MCMXC a.D. (1990).
The Enigma machine was invented by German engineer Arthur Scherbius at the end of World War I. [4] The German firm Scherbius & Ritter, co-founded by Scherbius, patented ideas for a cipher machine in 1918 and began marketing the finished product under the brand name Enigma in 1923, initially targeted at commercial markets. [5]