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2. History of rockets - Wikipedia

   en.wikipedia.org/wiki/History_of_rockets

   After the war, rockets were used to study high-altitude conditions, by radio telemetry of temperature and pressure of the atmosphere, detection of cosmic rays, and further research; notably the Bell X-1, the first manned vehicle to break the sound barrier. This continued in the US under von Braun and the others, who were destined to become part ...

3. Model rocket - Wikipedia

   en.wikipedia.org/wiki/Model_rocket

   A model rocket is a small rocket designed to reach low altitudes (e.g., 100–500 m (330–1,640 ft) for a 30 g (1.1 oz) model) and be recovered by a variety of means. According to the United States National Association of Rocketry (NAR) 's Safety Code, [ 1 ] model rockets are constructed out of lightweight and non metallic parts.

4. Hypixel - Wikipedia

   en.wikipedia.org/wiki/Hypixel

   Hypixel Network, [3] simply known as Hypixel, is a Minecraft server that hosts minigames. It was released on April 13, 2013 by Simon "Hypixel" Collins-Laflamme and Philippe Touchette, and is managed and run by Hypixel Inc. [4] Hypixel is only available on the Java Edition of Minecraft, [5] but briefly had a Bedrock variant.

5. 9K32 Strela-2 - Wikipedia

   en.wikipedia.org/wiki/9K32_Strela-2

   The 9K32 Strela-2 (Russian: Cтрела, lit. 'Arrow'; NATO reporting name SA-7 Grail) is a light-weight, shoulder-fired, surface-to-air missile or MANPADS system. It is designed to target aircraft at low altitudes with passive infrared-homing guidance and destroy them with a high-explosive warhead.

6. Android version history - Wikipedia

   en.wikipedia.org/wiki/Android_version_history

   The version history of the Android mobile operating system began with the public release of its first beta on November 5, 2007. The first commercial version, Android 1.0, was released on September 23, 2008. The operating system has been developed by Google on a yearly schedule since at least 2011. [1]

7. Rocket engine nozzle - Wikipedia

   en.wikipedia.org/wiki/Rocket_engine_nozzle

   Some typical values of the exhaust gas velocity v e for rocket engines burning various propellants are: 1.7 to 2.9 km/s (3800 to 6500 mi/h) for liquid monopropellants; 2.9 to 4.5 km/s (6500 to 10100 mi/h) for liquid bipropellants; 2.1 to 3.2 km/s (4700 to 7200 mi/h) for solid propellants