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  2. Speed of sound - Wikipedia

    en.wikipedia.org/wiki/Speed_of_sound

    The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium. At 20 °C (68 °F), the speed of sound in air is about 343 m/s (1,125 ft/s; 1,235 km/h; 767 mph; 667 kn ), or 1 km in 2.91 s or one mile in 4.69 s. It depends strongly on temperature as well as the medium through which a ...

  3. Radar beacon - Wikipedia

    en.wikipedia.org/wiki/Radar_beacon

    Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1] – defined as "A transmitter-receiver associated with a fixed navigational mark which, when triggered by a radar, automatically returns a distinctive signal which can appear on the display of the ...

  4. List of Jujutsu Kaisen episodes - Wikipedia

    en.wikipedia.org/wiki/List_of_Jujutsu_Kaisen...

    List of. Jujutsu Kaisen. episodes. Key visual for season 1. Jujutsu Kaisen is an anime television series based on Gege Akutami 's manga series of the same name. The anime series was announced in the 52nd issue of Weekly Shōnen Jump published in November 2019. [1] The story follows high school student Yuji Itadori as he joins a secret ...

  5. Sukhoi Su-25 - Wikipedia

    en.wikipedia.org/wiki/Sukhoi_Su-25

    Sukhoi Su-28. The Sukhoi Su-25 Grach ( Russian: Грач ( rook ); NATO reporting name: Frogfoot) is a subsonic, single-seat, twin-engine jet aircraft developed in the Soviet Union by Sukhoi. It was designed to provide close air support for Soviet Ground Forces. The first prototype made its maiden flight on 22 February 1975.

  6. Subaru EJ engine - Wikipedia

    en.wikipedia.org/wiki/Subaru_EJ_engine

    The Subaru EJ engine is a series of four-stroke automotive engines manufactured by Subaru. They were introduced in 1989, intended to succeed the previous Subaru EA engine. The EJ series was the mainstay of Subaru's engine line, with all engines of this series being 16-valve horizontal flat-fours, with configurations available for single, or ...

  7. HMS E15 - Wikipedia

    en.wikipedia.org/wiki/HMS_E15

    Like all post- E8 British E-class submarines, E15 had a displacement of 662 long tons (673 t) at the surface and 807 long tons (820 t) while submerged. She had a total length of 180 feet (55 m) [1] and a beam of 22 feet 8.5 inches (6.922 m). She was powered by two 800 horsepower (600 kW) Vickers eight-cylinder two-stroke diesel engines and two ...