If, for some reason such as economy, we are not going to develop aircraft nuclear propulsion with a sense of national urgency, then we should turn our effort to developing jet engines with a thrust-to-weight ratio of 12 or 15 to one.

If the ratio a '/ a be sufficiently constant, as is often the case, the above relation reduces to the condition of Airy, i. e. tan w '/ tan w = a constant.

If the nominal compression ratio of an engine is given, the pre-ignition cylinder pressure can be estimated using the following relationship:

If we think of the atoms as impenetrable steel discs and the impinging particle as a bullet of negligible diameter, this ratio is the probability that the bullet will strike a steel disc, i. e., that the atomic projectile will be stopped by the foil.

If is much smaller than, the mole ratio is almost identical to the mole fraction.

If is much smaller than, the mass ratio is almost identical to the mass fraction.

If the liquid and vapor are not evenly distributed across the superficial tower area as it enters the packed bed, the liquid to vapor ratio will not be correct in the packed bed and the required separation will not be achieved.

If a petrol engine were to have the same compression ratio, then knocking ( self-ignition ) would occur and this would severely reduce the efficiency, whereas in a Diesel engine, the self ignition is the desired behavior.

If this ratio is 1, the evidence is indifferent,

If a and b are distances from the fulcrum to points A and B and if force F < sub > A </ sub > applied to A is the input force and F < sub > B </ sub > exerted at B is the output, the ratio of the velocities of points A and B is given by a / b, so the ratio of the output force to the input force, or mechanical advantage, is given by

If the group of atoms is in thermal equilibrium, it can be shown from thermodynamics that the ratio of the number of atoms in each state is given by a Boltzmann distribution:

If the lifetime of this transition, τ < sub > 21 </ sub > is much longer than the lifetime of the radiationless 3 → 2 transition τ < sub > 32 </ sub > ( if τ < sub > 21 </ sub > ≫ τ < sub > 32 </ sub >, known as a favourable lifetime ratio ), the population of the E < sub > 3 </ sub > will be essentially zero ( N < sub > 3 </ sub > ≈ 0 ) and a population of excited state atoms will accumulate in level 2 ( N < sub > 2 </ sub > > 0 ).

If the component is a resistor with time-invariant voltage to current ratio, then:

If the producers chose to reformat the entire show for the 16: 9 ratio, live-action footage would have to be recropped, widening the frame to the full width of the 35 mm negatives while reducing its height.

If the ratio of the two resistances in the known leg is equal to the ratio of the two in the unknown leg, then the voltage between the two midpoints ( B and D ) will be zero and no current will flow through the galvanometer.

If the initial amount of Sr is known or can be extrapolated, the age can be determined by measurement of the Rb and Sr concentrations and the < sup > 87 </ sup > Sr /< sup > 86 </ sup > Sr ratio.

If the net gain is expressed as a ratio, and the ratio is less than unity, a net loss is indicated.

If a signal is present, then this factor represents the decrease in signal to noise ratio incurred using the receiver system with a noise temperature of.

If q is the product of that curvature with the circle's radius, signed positive for epi-and negative for hypo -, then the curve: evolute similitude ratio is 1 + 2q.

If the signal and the noise are measured across the same impedance, then the SNR can be obtained by calculating the square of the amplitude ratio:

If two goods are perfect substitutes then the indifference curves will have a constant slope since the consumer would be willing to switch between at a fixed ratio.

If the accuracy ratio is less than 4: 1, then the calibration tolerance can be reduced to compensate.

* Italo Calvino's novel If On a Winter's Night a Traveller deals extensively with the concepts surrounding false documents, including serially representing the contents of the novel itself as a false document.

Whether or not it is all-encompassing in so doing, Newtonian mechanics deals only with caused events, e. g.: If an object begins in a known position and is hit dead on by an object with some known velocity, then it will be pushed straight toward another predictable point.

* If a pack be discovered to be incorrect, redundant, or imperfect, the deal in which the discovery is made is void ; all preceding deals stand good.

" If evidence of participation by other nations in Iran's nuclear program is discovered, I will insist that the Administration use, rather than ignore, the evidence in determining how the U. S. deals with that nation or nations on other issues.

If all players pass, the hand is not played and the next dealer shuffles and deals.

If These Walls Could Talk, a film which deals with abortion in three different decades ( 1950s, 1970s, and 1990s ) became a huge success, and HBO's highest rated film ever.

If tenants rent for a shorter period, or month-to-month, they are instead charged significantly more per month, and are often denied any promotional deals.

Law 40. 2, which deals with the specifications for wicketkeepers ' gloves, states that: If ,.... the wicket-keeper wears gloves, they shall have no webbing between the fingers except joining index finger and thumb, where webbing may be inserted as a means of support.

If the opponent deals with the discovered attack ( obligatory if it is a check ), the attacking player will have time to return the moving piece out of harm's way.

If multiple games have been played, often the loser of the previous game shuffles and deals.

" If a product does not receive specific scores or better from aggregator sites like Metacritic, some deals require game publishers to pay higher royalties to Warner Bros.

: If application software is designed in such a way that its programmers are able to easily adapt the interface layer that deals with the OS, window manager or desktop environment to new or changing standards, then the programmers would only have to monitor notifications from the environment creators or component library designers and quickly adjust their software with updates for their users, all with minimal effort and a lack of costly and time-consuming redesign.

If a program deals with files, variable types that deal with files are often listed and declared.

If the boss is defeated by two or more players, the reward is awarded to the player who deals most damage on the enemy.

If the main stock is depleted before all the players have been serviced, the dealer shuffles the " folded " hands and deals those ; if that stock is depleted as well, the discards are shuffled and used.

In 2004, he told a reporter of the British political weekly New Statesman, regarding the way the CIA deals with terrorism suspects, " If you want them to be tortured, you send them to Syria.

" If " deals with a female narrator's fantasies of being someone's girlfriend.

If any joint co-owner deals in any way with a property inconsistent with a joint tenancy, that co-owner will be treated as having terminated ( sometimes called " breaking ") the joint tenancy.

If the Lot of Fortune deals with material well-being, the body, fortune and health, the Lot of Spirit represents the initiative taken by that person, or what use is made of what is given.

If no more moves are possible from the reserve, the player deals the cards from the stock one at a time to search for applicable cards.

If the player has made all possible moves, or all moves the player wanted to make, the player then deals the cards from the stock one at a time to the wastepile, the top card of which is available for play.

If the dealer deals an incorrect amount of cards to any player, he forfeits the hand, and his cards are removed from the game.

If it worked, it would be a valuable tool in future deals ; if it didn't, Drexel wouldn't suffer any significant losses.

If a deal is passed out, the same player deals again and the deal passed out does not count as one of the four deals.