rocket - définition. Qu'est-ce que rocket
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Qu'est-ce (qui) est rocket - définition

PYROKINETIC ENGINE USED FOR PROPULSION; FOR THE INCENDIARY WEAPON, SEE Q2037215
Rocket launch; Rockets; Rocket launch technology; Rocket (aeronautics); Hale rocket; Rocket and missile system; Rocket and Missile System; Rocket (spacecraft); Rocket Chair; Rocket vehicle; 🚀; Rocket body; Rocket launching; Rocket blast-off; Pendulum rocket fallacy; Dogleg (rocketry); Razzo
  • A balloon with a tapering nozzle. In this case, the nozzle itself does not push the balloon but is pulled by it. A convergent/divergent nozzle would be better.
  • [[Apollo 6]] while dropping the interstage ring
  • Launch of [[Apollo 15]] [[Saturn V]] rocket: ''T'' − 30 s through ''T'' + 40 s
  • boilerplate]] crew module.
  • Spacecraft staging involves dropping off unnecessary parts of the rocket to reduce mass.
  • 104}} during launch phase
  • Plot of instantaneous propulsive efficiency (blue) and overall efficiency for a rocket accelerating from rest (red) as percentages of the engine efficiency
  • Bumper]] sounding rocket
  • [[V-2 rocket]] launched from [[Test Stand VII]], summer of 1943
  • SRBs]], causing the breakup of the Shuttle stack
  • archive-date=2000-03-12 }}</ref>
  • Gas Core light bulb
  • Robert Goddard with a liquid oxygen-gasoline rocket (1926)
  • Rocket arrows depicted in the ''[[Huolongjing]]'': "fire arrow", "dragon-shaped arrow frame", and a "complete fire arrow"
  • Sri Lankan}} landmass.
  • Illustration of the pendulum rocket fallacy. Whether the motor is mounted at the bottom (left) or top (right) of the vehicle, the thrust vector (T) points along an axis that is fixed to the vehicle (top), rather than pointing vertically (bottom) independent of vehicle attitude, which would lead the vehicle to rotate.
  • A battery of Soviet [[Katyusha rocket launchers]] fires at German forces during the [[Battle of Stalingrad]], 6 October 1942
  • Forces on a rocket in flight
  • Grossly overexpanded}}
  • Rocket thrust is caused by pressures acting on both the combustion chamber and nozzle
  • [[Mysorean rockets]] and [[rocket artillery]] used to defeat an East India Company battalion during the Battle of Guntur.
  • 105}} on [[STS-134]]
  • Workers and media witness the Sound Suppression Water System test at [[Launch Pad 39A]].
  • A [[Soyuz-FG]] rocket launches from "[[Gagarin's Start]]" (Site 1/5), [[Baikonur Cosmodrome]]
  • Trident II missile]] launched from sea.
  • The Tsiolkovsky rocket equation gives a relationship between the mass ratio and the final velocity in multiples of the exhaust speed
  • Viking 5C]] rocket engine
  • bombardment of Copenhagen]] (1807) during the [[Napoleonic Wars]]

Rocket         
·noun Damewort.
II. Rocket ·noun A blunt lance head used in the joust.
III. Rocket ·noun Rocket larkspur. ·see Below.
IV. Rocket ·noun A cruciferous plant (Eruca sativa) sometimes eaten in Europe as a salad.
V. Rocket ·vi To rise straight up; said of birds; usually in the present participle or as an Adjective.
VI. Rocket ·noun An artificial firework consisting of a cylindrical case of paper or metal filled with a composition of combustible ingredients, as niter, charcoal, and sulphur, and fastened to a guiding stick. The rocket is projected through the air by the force arising from the expansion of the gases liberated by combustion of the composition. Rockets are used as projectiles for various purposes, for signals, and also for pyrotechnic display.
rocket         
(rockets, rocketing, rocketed)
Frequency: The word is one of the 3000 most common words in English.
1.
A rocket is a space vehicle that is shaped like a long tube.
N-COUNT
2.
A rocket is a missile containing explosive that is powered by gas.
There has been a renewed rocket attack on the capital.
N-COUNT: oft N n
3.
A rocket is a firework that quickly goes high into the air and then explodes.
N-COUNT
4.
If things such as prices or social problems rocket, they increase very quickly and suddenly. (JOURNALISM)
Fresh food is so scarce that prices have rocketed...
The nation has experienced four years of rocketing crime.
= soar
VERB: V, V-ing
5.
If something such as a vehicle rockets somewhere, it moves there very quickly.
A train rocketed by, shaking the walls of the row houses...
VERB: V prep/adv
rocket         
rocket1
¦ noun
1. a cylindrical projectile that can be propelled to a great height or distance by the combustion of its contents.
a missile or spacecraft propelled by an engine providing thrust on the same principle.
2. Brit. informal a severe reprimand.
¦ verb (rockets, rocketing, rocketed)
1. (of an amount, price, etc.) increase very rapidly and suddenly.
2. move very rapidly.
3. attack with rocket-propelled missiles.
Origin
C17: from Fr. roquette, from Ital. rocchetto, dimin. of rocca 'distaff (for spinning)', with ref. to its cylindrical shape.
--------
rocket2
¦ noun Brit. an edible Mediterranean plant of the cabbage family, eaten in salads. [Eruca vesicaria subsp. sativa.]
?used in names of other fast-growing plants of this family, e.g. sweet rocket.
Origin
C15: from Fr. roquette, from Ital. ruchetta, dimin. of ruca, from L. eruca 'downy-stemmed plant'.

Wikipédia

Rocket

A rocket (from Italian: rocchetto, lit. 'bobbin/spool') is a vehicle that uses jet propulsion to accelerate without using the surrounding air. A rocket engine produces thrust by reaction to exhaust expelled at high speed. Rocket engines work entirely from propellant carried within the vehicle; therefore a rocket can fly in the vacuum of space. Rockets work more efficiently in a vacuum and incur a loss of thrust due to the opposing pressure of the atmosphere.

Multistage rockets are capable of attaining escape velocity from Earth and therefore can achieve unlimited maximum altitude. Compared with airbreathing engines, rockets are lightweight and powerful and capable of generating large accelerations. To control their flight, rockets rely on momentum, airfoils, auxiliary reaction engines, gimballed thrust, momentum wheels, deflection of the exhaust stream, propellant flow, spin, or gravity.

Rockets for military and recreational uses date back to at least 13th-century China. Significant scientific, interplanetary and industrial use did not occur until the 20th century, when rocketry was the enabling technology for the Space Age, including setting foot on the Moon. Rockets are now used for fireworks, missiles and other weaponry, ejection seats, launch vehicles for artificial satellites, human spaceflight, and space exploration.

Chemical rockets are the most common type of high power rocket, typically creating a high speed exhaust by the combustion of fuel with an oxidizer. The stored propellant can be a simple pressurized gas or a single liquid fuel that disassociates in the presence of a catalyst (monopropellant), two liquids that spontaneously react on contact (hypergolic propellants), two liquids that must be ignited to react (like kerosene (RP1) and liquid oxygen, used in most liquid-propellant rockets), a solid combination of fuel with oxidizer (solid fuel), or solid fuel with liquid or gaseous oxidizer (hybrid propellant system). Chemical rockets store a large amount of energy in an easily released form, and can be very dangerous. However, careful design, testing, construction and use minimizes risks.

Exemples du corpus de texte pour rocket
1. One rocket is a 220mm rocket armed with a cluster–bomb warhead, and the other is a 305mm caliber rocket.
2. There were six mortar attacks, six rocket–propelled grenade attacks and six rocket attacks.
3. The Israel Air Force fired missiles at Palestinian rocket–launching squads in the Gaza Strip directly after a rocket salvo hit Ashkelon, destroying two rocket launchers.
4. The military said its forces targeted weapons caches, rocket–launching pads and rocket squads Friday.
5. Last night, an IDF force fired a rocket at Palestinians trying to launch a Qassam rocket.