noun
definition
The name of the Latin-script letter F.
conjunction
definition
Supposing that, assuming that, in the circumstances that; used to introduce a condition or choice.
example
If it rains, I shall get wet.
definition
In the event that a statement is true (a programming statement that acts in a similar manner).
example
If A, then B, else C.
definition
Supposing that; used with past or past perfect subjunctive indicating that the condition is closed.
example
I would be unhappy if you had not talked with me yesterday.
definition
Supposing that; given that; supposing it is the case that.
example
If that's true, we had better get moving!
definition
Although; used to introduce a concession.
example
He was a great friend, if a little stingy at the bar.
definition
(sometimes proscribed) Whether; used to introduce a noun clause, an indirect question, that functions as the direct object of certain verbs.
example
I don't know if I want to go or not.
definition
(usually hyperbolic) Even if; even in the circumstances that.
definition
Introducing a relevance conditional.
example
I have leftover cake if you want some.
Examples of ef in a Sentence
For two factors the standard form is (ab) 2; for three factors (ab) 2 (ac); for four factors (ab) 4 and (ab) 2 (cd) 2; for five factors (ab) 4 (ac) and (ab) 2 (ac)(de) 2; for six factors (ab) 6, (ab) 2 (bc) 2 (ca) 2, and (ab) 2 (cd) 2 (ef) 2 .
With further transfer of the carbon from the graphitic to the combined state, the matrix itself grows weaker (EF); but this weakening is offset in a measure by the continuing decrease of discontinuity due to the decreasing proportion of graphite.
Any number of points on the parabola are obtained by taking any point E on the directrix, joining EG and EF and drawing FP so that the angles PFE and DFE are equal.
It can be proved that the point C always moves in a straight line at right angles to the line EF.
F = T1 Ti = T1 (I ef9) Ta(ef 1)j When a belt connecting a pair of pulleys has the tensions of its two sides originally equal, the pulleys being at rest, and when the pulleys are next set in motion, so that one of them drives the other by means of the belt, it is found that the advancing side of the belt is exactly as much tightened as the returning side is slackened, so that the mean tension remains unchanged.
H Oaketig'ates p eF t ?
Morchard ennerl wfr' ary ef?
The platform and the load upon it are carried on four knife-edges, two of which, x 1 and x 2, are shown, and the load is transferred to the steelyard by the two levers shown, the upper one CD being known as the long body," and the lower, one EF as the " short body."
The particular bed marked EF has been entirely removed by denudation from the top of the anticline, and is buried deep beneath the centre of the syncline.
The principal blood-channels are two longitudinal vessels which run down the entire length of the body, and are known as the " afferent " vessel (af) and the " efferent " vessel (ef) respectively, from their relation to the tentacles.
His defence, at first only a pamphlet, became in its third edition a lengthy treatise entitled Inquiry into the Relation of Cause and Ef f ect, and is a fine specimen of Brown's analytical faculty.
Since the amounts of heat supplied at constant pressure from E to F and from E to C are in the limit proportional to the expansions EF and EC which they produce, the ratio S/s is equal to the ratio ECÆF.
As AB again moves from CD towards EF another compression or push is sent out, as it returns from EF towards CD another extension or pull, and so on.
We then have the polygon of forces Exaf, the reciprocal figure of the lines meeting at that point in the frame, and representing the forces at the point Exaf; the direction of the forces on EH and XA being known determines the direction of the forces due to the elastic reaction of the members AF and EF,, showing AF to push as a strut, while EF is a tie.
Divide CD by EF, and the quotient is the tangent of the angle of the sun from the wall.
For example, while you are shopping for electric heaters, you'll see that they can range anywhere from .7 to .95 in EF.
Such trips are offered through special student-oriented operators, such as World Expeditions and EF Tours.
The more inclusive term at the time, 'SF,' was pronounced as either 'Es Ef' or 'science fiction.'
The eyepiece slides into the tube cd, which screws into the brass ring ef, through two openings in which the oblong frame, containing the micrometer slides, passes.
In the process ef cell-fusion the cell-wall swells slightly and then begins to dissolve gradually at some one point.
Since the amounts of heat supplied at constant pressure from E to F and from E to C are in the limit proportional to the expansions EF and EC which they produce, the ratio S/s is equal to the ratio ECÆF.
As AB moves from CD to EF it pushes forward the layer of air in contact with it.
As AB returns from EF towards CD the layer of air next to it follows it as if it D E F were pulled back by AB.