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The Douglas D-558-2 Skyrocket (or D-558-II) is a rocket and jet-powered research supersonic aircraft built by the Douglas Aircraft Company for the United States Navy.On 20 November 1953, shortly before the (17 December) 50th anniversary of powered flight, Scott Crossfield piloted the Skyrocket to Mach 2, or more than 1,290 mph (2076 km/h), the first time an aircraft had exceeded twice the ...
Liquid breathing is a form of respiration in which a normally air-breathing organism breathes an oxygen-rich liquid which is capable of CO 2 gas exchange (such as a perfluorocarbon). [ 1 ] The liquid involved requires certain physical properties, such as respiratory gas solubility, density, viscosity, vapor pressure and lipid solubility, which ...
Peripheral artery disease most commonly affects the legs, but other arteries may also be involved, such as those of the arms, neck, or kidneys. [4][17] Peripheral artery disease (PAD) is a form of peripheral vascular disease. Vascular refers to both the arteries and veins within the body. PAD differs from peripheral veinous disease.
On July 14, 2022, YouTube made a special playlist and video celebrating the 317 music videos to have hit 1 billion views and joined the "Billion Views Club". [65] [66] On April 1, 2024, the communications app Discord incorporated a short trailer video into their in-app April Fools' Day prank regarding loot boxes. The video automatically looped ...
Wireless LAN (WLAN) channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each divided into a multitude of channels numbered at 5 MHz spacing (except in the 45/60 GHz band, where they are 0.54/1.08/2.16 GHz apart) between the centre frequency of the channel.
A Royal Australian Air Force aircraftswoman demonstrating the use of an oxygen mask during a pre-flight safety demonstration on board an Australian Airbus A330 MRTT. A pre-flight safety briefing (also known as a pre-flight demonstration, in-flight safety briefing, in-flight safety demonstration, safety instructions, or simply the safety video) is a detailed explanation given before take-off to ...
Williams composes for solo piano, chamber ensembles, choir and solo voice. Works for orchestra include Video Games Concerto, New West Overture, Rising Stars Overture, Oceanic Overture, American Prairie Sketches, Tarantella for piano and orchestra, composed for pianist Sean Chen; Princess Concerto for piano, narrator and orchestra; and The Gates of Hell a series of tone poems based on the Rodin ...
Platinum on carbon. Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Platinum on carbon, often referred to as Pt/C, is a form of platinum used as a catalyst. [1] The metal is supported on activated carbon in order to maximize its surface area and activity.