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:

If a rocket is launched to deliver a payload from a planetary surface into space it is called a launch vehicle.

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 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 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 I'd been careful it never woulda '' -- he stopped abruptly.

If in any one calculation Ptolemy had had to invoke 83 epicycles all at once, while Copernicus never required more than one third this number, then ( in the sense obvious to Margenau ) Ptolemaic astronomy would be simpler than Copernican.

If his circumspection in regard to Philip's sensibilities went so far that he even refused to grant a dispensation for the marriage of Amadee's daughter, Agnes, to the son of the dauphin of Vienne -- a truly peacemaking move according to thirteenth-century ideas, for Savoy and Dauphine were as usual fighting on opposite sides -- for fear that he might seem to be favoring the anti-French coalition, he would certainly never take the far more drastic step of ordering the return of Gascony to Edward, even though, as he admitted to the English ambassadors, he had been advised that the original cession was invalid.

If we wait until children are in junior high or high school, we will never manage it.

If you drive greater distances than that, you'll just be skimming the surface and will never discover the enchantment, fascination and beauty which lured you in the first place to explore the hinterlands.

If anyone asked us, after we made the remark that the suffering was a bad thing, whether we should think it relevant to what we said to learn that the incident had never occurred and no pain had been suffered at all, we should say that it made all the difference in the world, that what we were asserting to be bad was precisely the suffering we thought had occurred back there, that if this had not occurred, there was nothing left to be bad, and that our assertion was in that case mistaken.

If the photographically realistic continuity of dreams, however bizarre their combinations, denies that it is purely a composition of the brain, it must be compounded from views of diverse realities, although some of them may never be encountered in what we are pleased to call the real life.

If Bultmann's own definition of myth is strictly adhered to ( and it is interesting that this is almost never done by those who make such pronouncements ), the evidence is overwhelming that he does not at all exaggerate the extent to which the mythological concepts of traditional theology have become incredible and irrelevant.

If the mettle which Ellen exhibits has a bit of theatrical dross in it, never mind ; ;

If he died before she did, she would never be unable to resist opening it.

If we try to choose an element from each set, then, because X is infinite, our choice procedure will never come to an end, and consequently, we will never be able to produce a choice function for all of X.

If there was realism in the theater, there would never be a third act.

If he told others about it, her reputation would be ruined, as was his after a similar " indiscretion ," even though he was never prosecuted.

According to Ivinskaya, " If ever the conversation turned to Mandelstam, Leonidovich would always hark back to the same thing: that he was not to blame for his misfortunes, and that if he had not written to Bukharin and in general made a great fuss about his arrest, then perhaps Mandelstam would not even have had the respite, brief as it was, which was granted to him -- with the result that the Voronezh Notebooks might never have been written.

If the program hasn't halted yet, then it never will, since its contribution to the halting probability would affect the first N bits.

If the possibility of adding the empty string to a language is added to the strings recognized by the noncontracting grammars ( which can never include the empty string ) then the languages in these two definitions are identical.

If a state is not observable, the controller will never be able to determine the behaviour of an unobservable state and hence cannot use it to stabilize the system.

:” If we observe the totality of Pissarro ’ s work, we find there, despite fluctuations, not only an extreme artistic will, never belied, but also an essentially intuitive, purebred art.

" Screwattack. com listed the Duck Hunt dog as the " Biggest Douchebag in gaming " and said that " If you've never played Duck Hunt, you just don't understand.

If Alice collaborates with Paul Erdős on one paper, and with Bob on another, but Bob never collaborates with Erdős himself, then Bob is given an Erdős number of 2, as he is two steps from Erdős.

If anyone at my funeral has a long face, I'll never speak to him again.

If implemented using remainders of Euclidean division rather than subtractions, Euclid's algorithm computes the GCD of large numbers efficiently: it never requires more division steps than five times the number of digits ( base 10 ) of the smaller integer.

If you have never seen this movie, I highly recommend it.

Furthermore, the Mohist philosophical canon of the Mojing, compiled by the followers of Mozi ( c. 470-c. 390 BC ), provides the earliest known attempt to describe inertia: " The cessation of motion is due to the opposing force ... If there is no opposing force ... the motion will never stop.