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Page "Railway air brake" ¶ 17
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If and pressure
If A is the major axis of an ellipsoid and B and C are the other two axes, the radius of curvature in the ab plane at the end of the axis Af, and the difference in pressure along the A and B axes is Af.
If it is assumed that the formula given by Lodge of cosec Af applies, the pressure difference along the major axes can be calculated from the angle of inclination of the major axis, and from this the interfacial tension can be calculated.
If the distant patron of the suburban branch has been frightened away from downtown by traffic problems, however, the city store can only pressure the politicians to do something about the highways or await the completion of the federal highway program.
If the wind blows into the mouth of a tube it causes an increase of pressure on one side of the manometer.
If the pressure in a system remains constant ( isobaric ), a vapor at saturation temperature will begin to condense into its liquid phase as thermal energy ( heat ) is removed.
If the heat of vaporization and the vapor pressure of a liquid at a certain temperature is known, the normal boiling point can be calculated by using the Clausius-Clapeyron equation thus:
If the Bastarnae remained an identifiable group, it is highly likely that they participated in the vast Gothic-led migration, driven by Hunnic pressure, that was admitted into Moesia by emperor Valens in 376 and eventually defeated and killed Valens at Adrianople in 378.
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 the core becomes sufficiently dense, electron degeneracy pressure will play a significant part in stabilizing it against gravitational collapse.
If the nominal compression ratio of an engine is given, the pre-ignition cylinder pressure can be estimated using the following relationship:
If a second compression test is performed shortly thereafter, and the new reading is much higher, it would be the ring seal that is problematic, whereas if the compression test pressure observed remains low, it is a valve sealing ( or more rarely head gasket, or breakthrough piston or rarer still cylinder wall damage ) issue.
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 component changes another component's vapor pressure, or if the volatility of a component is dependent on its percentage in the mixture, the law will fail.
If the difference in vapor pressure between the two components A and B is large ( generally expressed as the difference in boiling points ), the mixture in the beginning of the distillation is highly enriched in component A, and when component A has distilled off, the boiling liquid is enriched in component B.
If the partial pressure of A at x < sub > 1 </ sub > is P < sub > A < sub > 1 </ sub ></ sub > and x < sub > 2 </ sub > is P < sub > A < sub > 2 </ sub ></ sub >, integration of above equation,
If the bullets have to travel a varying distance from the case to the point where they engage the rifling, then this can result in variations in pressure and velocity.
If acceleration can be felt by a body as the force ( hence pressure ) exerted by the object bringing about the acceleration on the body, jerk can be felt as the change in this pressure.
If the air density and temperature are the same above and below a wing, a naive application of the ideal gas law requires that the pressure also be the same.
If the absolute pressure of a fluid stays constant, the gauge pressure of the same fluid will vary as atmospheric pressure changes.
If the process pressure connection of an absolute pressure transmitter is open to the air, it will read the actual barometric pressure.

If and train
If she avoided the train and hired a buggy, the stableman might have recognized her.
If you want my advice, pack up and take the next train back to New York ''.
If not, actors frequently train in preparation for their roles, or the action director may rely more on stylized action or filmmaking tricks like camera angles, editing, doubles, undercranking, wire work, and computer-generated imagery.
If someone unknowingly sat on and therefore had control of a $ 10 note on the seat of a train, he or she could obtain possession by becoming aware of the note and forming the intention to possess it.
It was part of the commentary in a train collision in California in 2008: " If two trains are in the same place at the same time, someone was negligent.
If a following train encountered a burning fusee it was not to pass until the fusee burned out.
If not, actors frequently train in preparation for their roles, or the action director may rely more on stylized action or filmmaking tricks.
" You can't just stop a train ," he said, " If it misses its mark, it takes blocks and blocks to stop it and back up.
If TBTC fails on an individual train then it would be put into Restricted Manual mode, which means that the train operator can drive the train at 5 – 10 mph ( 8 – 16 km / h ) to the next station, where the train would be taken out of service until the fault is mended by technicians.
If the right point is connected, the right wheel's flange will be guided along the rail of that point, and the train will continue along the straight track.
If you diligently train yourself, you will be able to increase the overall force of the technique's impact.
If the train is moving fast enough, the track one is seeing will be just a blur-the angular speed of the track's motion on the retina is too fast for the eye to compensate with optokinetic tracking.
* If the pressure in the train line is higher than that of the reservoir, the triple valve connects the train line to the reservoir feed, causing the air pressure in the reservoir to increase.
If a train crew's route, or tour of duty, exceeds a single shift, or is in conflict with any rules pertaining to a legal or contractual limit to the number of hours that can be worked, more than one crew may be assigned, each with its own conductor, while onboard service crew members aboard passenger trains normally remain on duty for the entire run, including their assigned meal and sleep breaks.
If in a crash the driver became incapacitated, the Guard is the only person left who can protect the train.
If the camshaft is located in the crankcase, a valve train of pushrods and rocker arms will be required to operate overhead valves.
If one lives in a large urban metropolis, this sort of trip might also be extended, taking a train or coach to get to a more convenient starting point, and may in fact take a lot longer than 24 hours, making it a weekend tour, but it otherwise still works on the same planning principals.
If Mr. Elliott had therefore only had the prudence to wait where the excursion train stopped near the top of the bank and to send back one of the guards to protect his train, with instructions to ask the driver of the ordinary train to help the excursion train up the short remaining distance, he would hardly have lost time and would, besides, have avoided the risk inseparable from the delicate operation he unwisely determined to carry out and which should have been resorted to under only most exceptional circumstances and not, as in the present case, where there was so easy a solution of the difficulty.

If and line
If a child had a single drop of Negro blood, he would revert to the ancestral line which, except as slaves under a superior race, had not made one step of progress in 3,000 years.
If **ya is the multiple secant of **zg which passes through Af and **yb is the simple secant of **zg which passes through Af, and if Af are the points in which **ya meets **zg, and if Af is the image of Af on the generator **yb, it follows that the image of the line Af is Af.
If goodness and badness lie in attitudes only and hence are brought into being by them, those men who greeted death and misery with childishly merry laughter are taking the only sensible line.
If the cutting force, Af, is plotted against film thickness, a straight line should result passing through the origin and having slope Af.
If one also removes the second postulate (" a line can be extended indefinitely ") then elliptic geometry arises, where there is no parallel through a point outside a line, and in which the interior angles of a triangle add up to more than 180 degrees.
If light moves instantaneously, the telescope does not move, and the true direction of the star relative to the observer can be found by following the line ES.
Queen Boadicea features in the opening lyrics of the song " The Good Old Days " written by Pete Doherty and Carl Barat for British rock band The Libertines from their 2002 album " Up the bracket ", the line reads, " If Queen Boadicea is long dead and gone, Still then the spirit in her children's children's children, it lives on ".
If that steady-state signal was interrupted, it indicated one of two things: either the operator was about to start transmitting, or something else had happened to break the connection — such as a physical break in the telegraph line.
If Macbeth, rather than Malcolm, is Prince of Cumberland then Macbeth would be next in line to the throne and no coup would be needed, effectively removing this ambiguity from Banquo's character.
If the shooter " hits " the point value again ( any value of the dice that sum to the point will do ; the shooter doesn't have to exactly repeat the value combination of the come-out roll ) before rolling a seven, the Pass line wins and a new round starts, usually with the dice staying with the current shooter.
If the shooter rolls any seven before repeating the point number ( a " seven-out "), the Pass line loses and the dice pass to a new shooter for the next round.
* If the dealer's button is on, the table is in the point round where most casinos will allow a pass line bet to be placed.
If a 4, 5, 6, 8, 9, or 10 is thrown on the come-out roll ( i. e., if a point is set ), most casinos allow pass line bettors to take odds by placing from one to five times ( and at some casinos, up to 100 times ) the pass line bet behind the pass line.
If a player is playing don't pass instead of pass, they may also lay odds by placing chips behind the don't pass line.
If is any unit vector, the projection of the curl of F onto is defined to be the limiting value of a closed line integral in a plane orthogonal to as the path used in the integral becomes infinitesimally close to the point, divided by the area enclosed.
If the axial load on the column is not concentric, that is, its line of action is not precisely coincident with the centroidal axis of the column, the column is characterized as eccentrically loaded.
* If the offence scores a field goal, the scoring team must kickoff from their own 35-yard line.
* If the offence scores a touchdown, the scoring team must kickoff from their own 35-yard line.
If the original penalty yardage would have resulted in a first down or moving the ball past the goal line, a first down is awarded.
Thus, in 1964, in A Hard Day's Night, John Lennon mischievously taunts the road manager with the lineIf you're gonna have a barney, can I hold your coat ?".
If the bacterium senses that it is moving in the correct direction ( toward attractant / away from repellent ), it will keep swimming in a straight line for a longer time before tumbling.
If the line passes through the leftmost portion of the pixel, only the red subpixel is lit ; if it passes through the rightmost portion of the pixel, only the blue subpixel is lit.

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