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A laser ceilometer consists of a vertically pointing laser and a receiver in the same location. A laser pulse with a duration on the order of nanoseconds is sent through the atmosphere. As the beam travels through the atmosphere, tiny fractions of the light are scattered by aerosols.
According to the official list of the most-watched streaming titles of 2021, which was released on January 21, 2022, by Deadline Hollywood and Nielsen Holdings, Raya and the Last Dragon was the third-most-streamed film of 2021 with 8.34 billion minutes watched, behind Luca (2021) and Moana with 10.5 billion and 8.9 billion minutes watched ...
Anna Lee Fisher (born August 24, 1949) is an American chemist, emergency physician and former NASA astronaut who was the first mother to fly in space. Fisher became an astronaut candidate with NASA Astronaut Group 8 and joined the Astronaut Office for the development of the Canadarm and the testing of payload bay door contingency spacewalk ...
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The Sukhoi Su-30 ( Russian: Сухой Су-30; NATO reporting name: Flanker-C/G/H) is a twin-engine, two-seat supermaneuverable fighter aircraft developed in the Soviet Union by Russia's Sukhoi Aviation Corporation. It is a multirole fighter for all-weather, air-to-air and air interdiction missions. The Su-30 started as an internal development ...
The 2021 FIA Formula 2 Championship was a motor racing championship for Formula 2 cars that was sanctioned by the Fédération Internationale de l'Automobile (FIA). The championship was the fifty-fifth season of Formula 2 racing and the fifth season run under the FIA Formula 2 Championship moniker. It was an open-wheel racing category that ...
Aspect ratio (aeronautics) An ASH 31 glider with very high aspect ratio (AR=33.5) and lift-to-drag ratio (L/D=56) In aeronautics, the aspect ratio of a wing is the ratio of its span to its mean chord. It is equal to the square of the wingspan divided by the wing area. Thus, a long, narrow wing has a high aspect ratio, whereas a short, wide wing ...
Free Guy. Free Guy is a 2021 American action comedy film directed and produced by Shawn Levy from a screenplay by Matt Lieberman and Zak Penn, and a story by Lieberman. The film stars Ryan Reynolds, Jodie Comer, Lil Rel Howery, Utkarsh Ambudkar, Joe Keery, and Taika Waititi. It tells the story of a bank teller who discovers that he is a non ...