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If and ramjet
If the exhaust velocity of the ramjet were 1, 000, 000 m / s then d / dt ( mv < sub > 2 </ sub >)

If and could
If she did, he could stand it better in the light.
If I could make myself feel the same way
If you tell him I made a pass at you he might think you misunderstood something I said or did, so instead of just telling him I made a pass, say I tried to date you and that you agreed so you could prove to him what a louse I really am.
If it were not that I knew who it was I could have mistaken it for my Aunt so well did her clothes fit him.
If we were creating a wholly new society, we could insist that our social, political, economic and philosophic institutions foster rather than hamper man ; ;
If you had screamed right there in the street where we stood, I could not have felt more fear.
If Robinson was a liar and a slanderer, he was also a very canny gentleman, for nothing that Pike could do would pry so much as a single word out of him.
If Woodruff could not furnish a strong explanation, the governor insisted that he lower his prices in accord with the scale printed in The Advocate.
If an atom bomb in 1945 could destroy an entire city surely the atomic arsenal we now have is more than adequate to fulfill any military objective required of it.
If only this could be done more often -- with such heartening results -- many of the earth's `` big problems '' would shrink to the insignificances they really are.
If the crummy bastard could write!!
If only Simms Purdew could do that, whatever the thing he remembered and told.
If there is time after the warning, the basement shielding could be improved substantially by blocking windows with bricks, dirt, books, magazines, or other heavy material.
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 we stop thinking in terms of tremendous multimegaton nuclear weapons and consider employing much smaller nuclear weapons which may be more appropriate for most important military targets, it would seem that the B-52 or B-70 could carry a great many small nuclear weapons.
If we could use all the small airfields we have in this country, we could disperse our strategic aircraft by a factor of 10 or more.
If notched for the battens, they would require more work, be weakened and limber holes would have to be bored so that bilge water could flow through.
`` If I could only think of something at the studio, near me, to absorb his boundless energy '', I said.
If only state funds were used to pay for the vocational education, it could be argued that the state should not have to bear the cost of vocational training which would benefit employers in other states.
If it could be shown that judgments of good and bad were not judgments at all, that they asserted nothing true or false, but merely expressed emotions like `` Hurrah '' or `` Fiddlesticks '', then these wayward judgments would cease from troubling and weary heads could be at rest.
If, however, the figure to be discerned were complicated, composed of several interlocking subfigures, and so on, even the tracing process failed him, and he could not focus even relatively simple shapes among its parts.
If they opted for illusion, it could only be illusion per se -- an illusion of depth, and of relief, so general and abstracted as to exclude the representation of individual objects.
If you look at a reading meant for someone else, you will probably see that many of the items could be considered as applicable to you, even when you were not in the picture at all!!

If and accelerate
If the expansion of the Universe continues to accelerate, there is a future horizon as well.
If the glass is damaged, atmospheric pressure can collapse the vacuum tube into dangerous fragments which accelerate inward and then spray at high speed in all directions.
If, on the contrary, the upper air is cooler than predicted by the adiabatic lapse rate, then when the air parcel rises to its new height it will have a higher temperature and a lower density than its surroundings, and will continue to accelerate upward.
If one is not paying attention, or if the teacher has not explained the drill properly, the training can accelerate and become competitive ; if this happens, the students are missing the point of the exercise altogether.
If the unemployment rate stays below this " natural " or " inflation threshold " level for several years, it is posited that inflation will accelerate, i. e. get worse and worse ( in the absence of wage and price controls ).
If the gust front, or leading edge of the outflow boundary, races ahead of the thunderstorm, its motion will accelerate in tandem.
If enough enamel has been abraded, the softer dentin will be exposed, and abrasion will accelerate.
If no obstacle needs to be cleared, or after an obstacle is cleared, the pilot can accelerate to the best rate of climb speed ( V < sub > y </ sub >), where the aircraft will gain the most altitude in the least amount of time.
If we ... do not exert now, we may accelerate the abject state to which the Constitution may be reduced ".
If you " brake " too early, it will take you longer to accelerate out of the turn.
If the " push " is based on the electromagnetic force, this would simply mean the mass accelerates in the opposite direction than what one would expect based on its charge ; for example, an object with negative inertial mass and positive charge would accelerate away from objects with negative charge, and accelerate towards objects with positive charge, the opposite of the normal rule that like charges repel and opposite charges attract.
If the masses are equal in magnitude but opposite in sign, then the momentum of the system remains zero if they both travel together and accelerate together, no matter what their speed:
" However, this positive message about the innocuous-seeming toy was undercut by a much lengthier number of bizarre disclaimers and warnings, including " may suddenly accelerate to dangerous speeds " and " If Happy Fun Ball begins to smoke, seek shelter and cover head.
If all the energy to accelerate the fuel comes from an external source ( and there is no additional momentum transfer ), then the relationship between effective exhaust velocity and specific impulse is as follows:
If the electron ( s ) from electrode A strike electrode B at this time and produce additional free electrons, these new free electrons will begin to accelerate toward electrode A.
If advertising is effective enough and a product flawed enough, the advertising will accelerate the destruction of the brand.
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 it is performed in a manner that causes the spin to accelerate, it is considered a feature that adds difficulty.
If the ions are entering the sheath too slowly, the sheath potential will " eat " its way into the plasma to accelerate them.
If all the fuel was consumed, a ship would be unable to accelerate.
If it exists, it could cause the expansion of the universe to accelerate so quickly that the Big Rip would occur.
If this is true, the expansion of the universe reaches an infinite degree in finite time, causing expansion to accelerate without bounds.
If an electric potential is applied between this metal plate and yet another, the emitted electrons will accelerate to the next metal plate and induce secondary emission of still more electrons.

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