If a 2, 000 ( lb / ac )/ year sequestration rate was achieved on all of cropland in the United States, nearly 1. 6 billion tons of carbon dioxide would be sequestered per year, mitigating close to one quarter of the country's total fossil fuel emissions.

If water is evaporated too quickly, the membrane dries, resistance across it increases, and eventually it will crack, creating a gas " short circuit " where hydrogen and oxygen combine directly, generating heat that will damage the fuel cell.

If so, these huge stars would have quickly consumed their supply of fuel and became supernovae, releasing heavy elements into the interstellar medium.

If enough nuclear fuel is assembled in one place, or if the escaping neutrons are sufficiently contained, then these freshly emitted neutrons outnumber the neutrons that escape from the assembly, and a sustained nuclear chain reaction will take place.

If the shaft is too long it will extend farther into the water than necessary creating drag, which will impair performance and fuel economy.

If the range is increased beyond that point, payload has to be sacrificed for fuel.

If the containment fields ever fail, the subsequent interaction of the antimatter fuel with the container walls would result in a catastrophic release of energy, with the resultant explosion capable of utterly destroying the ship.

If the detonation does not occur exactly as planned, such as in the case of a misfire, a nuclear reaction is unlikely to occur-the explosion will be no greater than the amount of conventional explosive ( although radioactive material — the unreacted nuclear fuel — may be dispersed ).

If done by direct propulsion, the rocket equation dictates that a large fraction of the spacecraft mass must be fuel.

If the Otto cycle is abandoned, however, and fuel is injected directly into the combustion-chamber during the compression stroke, the petrol engine is liberated from a number of its limitations.

If the heat from that reaction is not removed adequately, the fuel assemblies in a reactor core can melt.

If methane is captured rather than allowed to outgas, it can be used for fuel, closing the carbon cycle.

If the jet-propulsion unit is not well-matched to the engine performance, inefficient fuel consumption and poor performance can result.

If the perfect quantity of fuel were added to a slightly subcritical mass to create an " exactly critical mass ", fission would be self-sustaining for one neutron generation ( fuel consumption makes the assembly subcritical ).

If the perfect quantity of fuel were added to a slightly subcritical mass, to create a barely supercritical mass, the temperature of the assembly would increase to an initial maximum ( for example: 1 K above the ambient temperature ) and then decrease back to room temperature after a period of time, because fuel consumed during fission brings the assembly back to subcriticality once again.

If glucose is still denied at this point, muscle wasting is prevented by temporarily switching to fat as the primary fuel source, with glucose made as a byproduct during ketosis.

If the fast is not broken, starvation begins to occur, as the body begins to use protein for fuel.

If spent fuel is not reprocessed, the fuel cycle is referred to as an open fuel cycle ( or a once-through fuel cycle ); if the spent fuel is reprocessed, it is referred to as a closed fuel cycle.

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 the core becomes sufficiently dense, electron degeneracy pressure will play a significant part in stabilizing it against gravitational collapse.

If the earlier completion procedure is applied to a normed vector space, the result is a Banach space containing the original space as a dense subspace, and if it is applied to an inner product space, the result is a Hilbert space containing the original space as a dense subspace.

If the fluid being measured is significantly dense, hydrostatic corrections may have to be made for the height between the moving surface of the manometer working fluid and the location where the pressure measurement is desired except when measuring differential pressure of a fluid ( for example across an orifice plate or venturi ), in which case the density ρ should be corrected by subtracting the density of the fluid being measured.

If someone was submerged in a liquid more dense than water, the pressure would be correspondingly greater.

If a substance's relative density is less than one then it is less dense than the reference ; if greater than 1 then it is denser than the reference.

If, as observed in most cases, a substance is more dense in the solid than in the liquid state, the melting point will increase with increases in pressure.

If the leaf canopy is destroyed or thinned, the ground beneath is soon colonized by a dense, tangled growth of vines, shrubs and small trees, called a jungle.

If X is a Tychonoff space then the map from X to its image in βX is a homeomorphism, so X can be thought of as a ( dense ) subspace of βX.

If it is not, then it can be completed: one can find an essentially unique complete topological ring S which contains R as a dense subring such that the given topology on R equals the subspace topology arising from S.

If the satellite is more than twice as dense as the primary, as can easily be the case for a rocky moon orbiting a gas giant, then the Roche limit will be inside the primary and hence not relevant.

If f is assumed to be continuous as well then this can be extended to show that homogeneity for α any real number, using the fact that rationals form a dense subset of the reals.

If X is a Baire space then the points where f is not continuous is a meagre set in X and the set of points where f is continuous is dense in X.

No notation is used to describe the set of all λ, which satisfy this condition, but for a subset: If λ-T does not have dense range but is injective, λ is said to be in the residual spectrum of T, denoted by σ < sub > r </ sub >( T ).

If the requirement for the countable chain condition is replaced with the requirement that R contains a countable dense subset ( i. e., R is a separable space ) then the answer is indeed yes: any such set R is necessarily isomorphic to R.

If the object is either less dense than the liquid or is shaped appropriately ( as in a boat ), the force can keep the object afloat.

If f is a non-constant entire function, then its image is dense in C. This might seem to be a much stronger result than Liouville's theorem, but it is actually an easy corollary.

If the image of f is not dense, then there is a complex number w and a real number r > 0 such that the open disk centered at w with radius r has no element of the image of f. Define g ( z ) = 1 /( f ( z ) − w ).

If the majority of elements differ from zero, then it is common to refer to the matrix as a dense matrix.

If the slope is rational then all leaves are closed curves homeomorphic to the circle, while if it is irrational, the leaves are noncompact, homeomorphic to the real line, and dense in the torus ( cf Irrational rotation ).

If X is integral but not affine, then any non-empty affine open set will be dense in X.

If the charge areas were positive, a widely extending patch is seen on the plate, consisting of a dense nucleus, from which branches radiate in all directions.

If the soil strain-hardens, e. g. moderately dense to dense sand, flow liquefaction will generally not occur.