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If and vacuum
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 light pressure were the cause of the rotation, then the better the vacuum in the bulb, the less air resistance to movement, and the faster the vanes should spin.
If one assumed that magnetopause was just a boundary between a magnetic field in a vacuum and a plasma with a weak magnetic field embedded in it, then the magnetopause would be defined by electrons and ions penetrating one gyroradius into the magnetic field domain.
If the bias is small, we can let U − E ≈ φM in the expression for κ, where φM, the work function, gives the minimum energy needed to bring an electron from an occupied level, the highest of which is at the Fermi level ( for metals at T = 0 kelvins ), to vacuum level.
If the extra electrode ( also called a " plate " or " anode ") is made more positive than the hot filament, a direct current flows through the vacuum to the anode ( a demonstration of the Edison effect ).
If true, sonoluminescence may be the first observable example of quantum vacuum radiation.
If toner spills into the laser printer, a special type of vacuum cleaner with an electrically conductive hose and a high efficiency ( HEPA ) filter may be needed for effective cleaning.
If antihydrogen atoms were to be suspended in a perfect vacuum, however, they should survive indefinitely.
If the boulder is touched, it snaps open like a set of jaws and pulls any unfortunate creature into it with a powerful vacuum.
If the capsule had been completely depressurised to a high vacuum, the accident would not have occurred.
If, for example, a pair of atomic nuclei are merged to very briefly form a nucleus with a charge greater than about 140, ( that is, larger than about the inverse of the fine structure constant, which is a dimensionless quantity ), the strength of the electric field will be such that it will be energetically favorable to create positron-electron pairs out of the vacuum or Dirac sea, with the electron attracted to the nucleus to annihilate the positive charge.
If forceps or vacuum extraction are used in vaginal births, the first signs of hemophilia may be severe head bruising or hematomas or even intracranial hemorrhage.
If a BGA is found to be badly soldered, it can be removed in a rework station, which is a jig fitted with infrared lamp ( or hot air ), a thermocouple and a vacuum device for lifting the package.
If the " vacuum " has a pressure of 10 < sup >- 6 </ sup > mmHg or less, the main vehicle of conduction is electrons.
If the bore is a total vacuum ( such as a tube with a plasma window ) there is no friction at all which helps prolonged reusability.
If the Ricci tensor satisfies the vacuum Einstein equation, then the manifold is an Einstein manifold, which have been extensively studied ( cf.
If the theory has a mass gap, i. e. there are no masses between 0 and some constant greater than zero, then vacuum expectation distributions are asymptotically independent in distant regions.
If we assume that V is nonnegative and is zero only for the Higgs vacuum and that the Higgs field is in the adjoint representation, then
If there is a field ( often a background field ) which acquires an expectation value ( not necessarily a vacuum expectation value ) which is not invariant under the symmetry in question, we say that the system is in the ordered phase, and the symmetry is spontaneously broken.
If using a system of units where the speed of light in vacuum is defined as exactly 1, for example if space is measured in light-seconds and time is measured in seconds, then the cone will have a slope of 45 °, because light travels a distance of one light-second in vacuum during one second.
If the balls fall in a vacuum, then there's no air resistance and their final speeds will be the same.
If the energy-momentum tensor is zero in the region under consideration, then the field equations are also referred to as the vacuum field equations.
If, then the distinguished vector in the Hilbert space is thought of as the vacuum state defined by.
If intakes and outlets are submerged, a vacuum pump may be applied at the crest to prime the siphon.

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.

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