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Page "Rocket launch" ¶ 25
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If and rocket
If we were to set 80 % of the mass of the photon rocket
If a photon rocket begins its journey in low earth orbit, then one year of thrusting may be required to achieve an earth escape velocity of 11. 2 km / s if the vehicle is already in orbit at a velocity of 9, 100 m / s, and 400 m / s additional velocity is obtained from the east to west rotation of the earth.
If the rocket or aircraft is moving at about a constant speed, then distance divided by time is just speed, so power is thrust times speed:
After being chosen to be the first teacher in space, McAuliffe was a guest on several television programs, including Good Morning America ; the CBS Morning News ; the Today Show ; and The Tonight Show Starring Johnny Carson, where, when asked about the mission, she stated, " If you ’ re offered a seat on a rocket ship, don ’ t ask what seat.
If done by direct propulsion, the rocket equation dictates that a large fraction of the spacecraft mass must be fuel.
If even more speed is needed than available from gravity assist alone, the most economical way to utilize a rocket burn is to do it near the periapsis ( closest approach ).
If the rocket does not launch within the " window ", it has to wait for the next window.
If the manoeuvre from GTO to GEO is to be performed with a single impulse, as with a single solid rocket motor, apogee must occur at an equatorial crossing.
If all went well the rocket would reroute the fuel for this engine to the other engines and have the rocket burn longer to compensate for the loss of acceleration.
If the cycle happens to match a resonance frequency of the rocket then dangerous oscillations can occur through positive feedback, which can in extreme cases tear the vehicle apart.
If the rocket is never lit then SpaceShipOne can glide down to the ground.
If aerodynamic drag and transient changes in pressure are neglected, a closed-form approximation for the peak height of a rocket fired vertically can be expressed as follows:
If the centre of mass is placed forward of the fins, the rocket will nose dive.
If the force is too much, no metal will hold it and the ship will blow up, so imposing a strict limit on how fast a rocket can accelerate ) and people using oxygen pills to survive unprotected in the vacuum of space ( which would suck their blood out through their skin and the air from their lungs as well as popping their eyes ), Space Patrol was better up on science.
If the rocket failed during the first phases of the flight, the Emergency Detection System ( EDS ) would automatically give the command to abort.
* Pad abort: If the rocket failed in the last five minutes before launch, the CM and the launch escape system ( LES, see figure ) would separate from the remainder of the rocket below with the LES propelling itself and the CM beneath it upward and eastward to the sea using a small solid-fuelled engine ( the pitch control motor ) at the top of the tower on the launch escape system.
If a rocket exceeds these capabilities ( or if it has a person on-board ), it is considered licensable.
If he does not contact them by that time, then they can launch the rocket.
If a stable or circular orbit is needed, once the payload reaches the highest part of its trajectory then an on-board rocket engine (" kick motor ") or other means is needed to circularize the trajectory to the appropriate Earth orbit.
If any of the worldlines bends away from a geodesic path in some region, we can think of the observers as test particles that accelerate by using ideal rocket engines with a thrust equal to the magnitude of their acceleration vector.

If and is
If the circumstances are faced frankly it is not reasonable to expect this to be true.
If his dancers are sometimes made to look as if they might be creatures from Mars, this is consistent with his intention of placing them in the orbit of another world, a world in which they are freed of their pedestrian identities.
If a work is divided into several large segments, a last-minute drawing of random numbers may determine the order of the segments for any particular performance.
If they avoid the use of the pungent, outlawed four-letter word it is because it is taboo ; ;
If Wilhelm Reich is the Moses who has led them out of the Egypt of sexual slavery, Dylan Thomas is the poet who offers them the Dionysian dialectic of justification for their indulgence in liquor, marijuana, sex, and jazz.
If he is the child of nothingness, if he is the predestined victim of an age of atomic wars, then he will consult only his own organic needs and go beyond good and evil.
If it is an honest feeling, then why should she not yield to it??
If he thus achieves a lyrical, dreamlike, drugged intensity, he pays the price for his indulgence by producing work -- Allen Ginsberg's `` Howl '' is a striking example of this tendency -- that is disoriented, Dionysian but without depth and without Apollonian control.
If love reflects the nature of man, as Ortega Y Gasset believes, if the person in love betrays decisively what he is by his behavior in love, then the writers of the beat generation are creating a new literary genre.
If he is good, he may not be legal ; ;
If the man on the sidewalk is surprised at this question, it has served as an exclamation.
If the existent form is to be retained new factors that reinforce it must be introduced into the situation.
If we remove ourselves for a moment from our time and our infatuation with mental disease, isn't there something absurd about a hero in a novel who is defeated by his infantile neurosis??
If many of the characters in contemporary novels appear to be the bloodless relations of characters in a case history it is because the novelist is often forgetful today that those things that we call character manifest themselves in surface behavior, that the ego is still the executive agency of personality, and that all we know of personality must be discerned through the ego.
If he is a traditionalist, he is an eclectic traditionalist.
If our sincerity is granted, and it is granted, the discrepancy can only be explained by the fact that we have come to believe hearsay and legend about ourselves in preference to an understanding gained by earnest self-examination.
If to be innocent is to be helpless, then I had been -- as are we all -- helpless at the start.

If and launched
If launched in a careful but determined way within the next few weeks, the Peace Corps could have several hundred persons in training this summer for placement next fall.
If the intruder persisted, a biting lunge was usually launched at either the tail region or the naso-labial grooves.
If the CSM failed, the spacecraft and Saturn IB for the next Skylab mission would have been launched with two astronauts to retrieve the crew ; given Skylab's ample supplies, its residents would have been able to wait up to several weeks for the rescue mission.
If Soviet officers had launched them, many millions of US citizens could have been killed.
If was an American science fiction magazine launched in March 1952 by Quinn Publications, owned by James L. Quinn.
If was launched in the middle of this second publishing boom.
If the Soviet Union launched a sneak attack and the US did not respond immediately, the majority of their missiles and strategic bombers might be caught on the ground.
If they chose to respond in kind and attack the remaining Soviet missile fleet, there would be little to respond with if the Soviets immediately launched against US cities.
If a major offensive was launched against a point in the line, mobile reinforcements would be sent to reinforce that part of the line that was in danger of failing.
When the series launched in early 1979, the press advertising used the line " If you think prison is hell for a man, imagine what it's like for a woman .".
If he were to implant his Copy into the TVC universe, have the copy run a number of experiments to anchor itself in that universe, and then terminate it, only to find himself still in the TVC universe ( indeed, the purpose of growing the TVC universe from a Garden of Eden configuration was to prove to his Copy that such a TVC universe as it found itself to inhabit must have been launched from a non-TVC universe, as opposed to merely having always existed and evolved towards this the current state in which he did not know whether it had ) rather than back in " the real world " again, then he would be vindicated ; if not, then his hypothesis would be falsified and he might consider himself crazy ( his last several experiences of termination and subsequent continuation involved him finding himself in the position of having been recently cured of psychosis ).
If the momentum imparted to the coin as it is launched were known with sufficient accuracy,
When first launched, it struggled under the overhead of the software and operating system, which consumed almost 60 MB on disk, a vast sum at the time, leading some wags to suggest that the pre-announce code name for the series, PACIFIC, was actually an acronym meaning " Performance Ain't Critical If Function Is Complete ".
If launched, LISA will be the first dedicated space-based gravitational-wave detector ; it will measure gravitational waves by using laser interferometry to monitor the fluctuations in the relative distances between three spacecraft, arranged in an equilateral triangle with 5 million kilometer arms, and flying along an Earth-like heliocentric orbit.
If disabled, the Finder would quit when the user launched another application, thus freeing RAM for it.
They launched the album with an appearance on Jimmy Kimmel Live !, performing the songs " If U C Jordan " and " Space ", the latter of which became the only single from the album.
If the service had been launched and had been a commercial success in Italy, it was then planned to make similar services available in Germany and Switzerland.
During the Ice Dream they launched a bid for the Winter Olympics to be held at Smiggin Holes, in the humorous Smiggin Holes 2010 Winter Olympic bid with suggested slogans " Unleash the Mighty Mongrel ", " Winter Wonder Down Under " and " If you've got the poles, we've got the holes.
If a satellite phone provider encounters trouble with its network, handset prices will fall, then increase once new satellites are launched.
If the 60 seconds expired, all four pies would be launched.
If the " baby Sapphire " brought about the beginning of the end for Armstrong Siddeley, it was because Jaguar had launched the unitary-construction 2. 4 saloon in 1955, which was quicker, significantly cheaper, and much better-looking than the lumpy and frumpy 234 / 236 design.
If the projectile is launched with an initial velocity v < sub > 0 </ sub >, then it can be written as
In addition, MMAL launched an advertising campaign that starred MMAL's then CEO Tom Phillips, who told potential customers " If you can find a better built car – buy it !”.
If the character proved popular, a new series was launched.

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