If you travel over the vast U.S.A. you will, no doubt, discover that feeding is an expensive business.

If the wedding party lasted late, and the travel schedule means there are only a few hours before resuming the trip or making an early start, the husband may forestall tensions and uncertainties by confiding to his bride that lying in each other's arms will be bliss enough for these few hours.

If the fletching is not arranged to induce rotation, it will still improve accuracy by causing a restoring drag any time the arrow tilts away from its intended direction of travel.

If a laser is swept across a distant object, the spot of laser light can easily be made to move across the object at a speed greater than c. Similarly, a shadow projected onto a distant object can be made to move across the object faster than c. In neither case does the light travel from the source to the object faster than c, nor does any information travel faster than light.

If this sounds indulgent, it allows simultaneity, absolute space and time and a deterministic universe ( along with decoherence theory ) whilst the status-quo permits time travel / causality paradoxes, subjectivity in the measurement process and multiple universes.

" If interstellar travel is possible, even the " slow " kind nearly within the reach of Earth technology, then it would only take from 5 million to 50 million years to colonize the galaxy.

If the target is a hard and heavy object, or if it is resting on some sort of anvil, the head can travel only a very short distance d before stopping.

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 Orderic Vitalis is to be relied upon, one of Malcolm's earliest actions as King may have been to travel south to the court of Edward the Confessor in 1059 to arrange a marriage with Edward's kinswoman Margaret, who had arrived in England two years before from Hungary.

If the master plan is successful, many commuters will travel to work in a core area nearer their homes, and the downtown area's daytime population will decrease.

If the diaphragm is placed on the patient, body sounds vibrate the diaphragm, creating acoustic pressure waves which travel up the tubing to the listener's ears.

If the average speed and time of travel is known, distance traveled can be found by a rearrangement of the definition, leaving us with:

If one rider closely follows, they draft or slipstream another, because the leading rider pushes air around themselves ; any rider closely following has to push out less air than the lead rider and thus can travel at the same speed while expending less effort.

If, instead of incorporating Einstein's clock synchronization ( lattice of clocks ), the astronaut ( outgoing and incoming ) and the Earth-based party regularly update each other on the status of their clocks by way of sending radio signals ( which travel at light speed ), then all parties will note an incremental build up of asymmetry in time-keeping, beginning at the " turn around " point.

Another more recent story involving travel to the future is Louis-Sébastien Mercier's L ' An 2440, rêve s ' il en fût jamais (" The Year 2440: A Dream If Ever There Were One "), a utopian novel in which the main character is transported to the year 2440.

If the components of the computer were too large or the wires interconnecting them too long, the electric signals couldn't travel fast enough through the circuit, thus making the computer too slow to be effective.

If a limited form lives within an unlimited void, the form could only wander aimlessly about, because what is unlimited is ungraspable ; meaning, the limited form would travel forever, for it does not have any obstacles.

If space permitted, passengers could also travel.

If there were no geomagnetic field and no additional atoms in the lower atmosphere for additional collisions, the electrons would continue to travel downward with an average current density in the stratosphere of about 48 amperes per square metre.

If unobstructed, radio waves will travel in a straight line from the transmitter to the receiver.

If the message is not accepted by any node on the network, it will travel around the entire ring and return to the sender.

De Camp's most highly regarded works in the genre are his time travel and alternate history stories, including Lest Darkness Fall ( 1939 ), " The Wheels of If " ( 1940 ), " A Gun for Dinosaur " ( 1956 ), " Aristotle and the Gun " ( 1958 ), and The Glory That Was ( 1960 ) – in the last of which the " time travel " actually turns out to be a tour de force of historical recreation.

If the room is at negative pressure, the smoke will travel under the door and into the room.

If, as she walked, her steps fumbled from time to time, she chose to ignore that omen.

If the bluff failed and they ran into trouble, Brannon had told the others, they would withdraw -- and he would come after his son another time.

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 the would-be joiner asks these questions he is not likely to be duped by extremists who are seeking to capitalize on the confusions and the patriotic apprehensions of Americans in a troubled time.

If the world comes to this, wouldn't it be the very time when courage and American know-how would be needed to help survivors rebuild??

If their schedules were to synchronize, there was no point in wasting time.

`` If I catch you one more time down here without stockings '' --

If there is time after the warning, the basement shielding could be improved substantially by blocking windows with bricks, dirt, books, magazines, or other heavy material.

If, in the trustee's judgment, `` reasonable market conditions '' did not prevail during any given year, he was to be allowed to petition the court for an extension of time within the ten-year period.

If the reserve components are to serve effectively in time of war, their basic organization and objectives must conform to the changing character and missions of the active forces.

If you elect to use the Standard Deduction or the Tax Table, and later find you should have itemized your deductions, you may do so by filing an amended return within the time prescribed for filing a claim for refund.

If you mail A return or tax payment, you must place it in the mails in ample time to reach the district director on or before the due date.

If the lever is pulled to clear a signal or move a switch, the tappet moves a short distance lengthwise at the same time.

If necessary to replace both halves on grill, sear cuts and allot extra time.

If the background of design is too smooth, or you wish to create a wood-grained effect, it may be added at this time with a dull tool such as the handle of a fine paintbrush.

If companies will take the time to give objective consideration to their major problems and to the questions they provoke, then a long constructive step will have been taken toward more effective marketing in next decade.

If you've travelled in Europe a time or two, it is quite certain that you've had that wanting-to-be-alone feeling or that you will get it on your next visit across the Atlantic.

`` If you are trying to get us out of the brothel, the dustbin, the kitchen sink, and the tawdry living-room, you are probably wasting your time '', Moreland told me.

If, at any time during the assignment pass, the compiler finds that there are no more index words available for assignment, the warning message `` No More Index Words Available '' will be placed in the object program listing, the table will be altered to show that index words 1 through 96 are available, and the assignment will continue as before.

If Depew had told any academic psychologist that he had a weird feeling of having lived through that identical convention session at some time in the past, he would have been informed that he was a victim of deja vue.

If baby teeth are retained too long, the incoming second teeth may be prevented from emerging at the normal time or may have to erupt in the wrong place.

If one lives near a subway or an express parkway, the solution is to have one's wines stored with a dealer and brought home a few at a time.

If this woman had delayed until after 11:20 to start her shopping, she would have had little time in which to prepare the substantial meal that was eaten at dinner in those days.

If you have taken this stroll in the morning, and you have the time and inclination, walk to the right along the crowded Corso for half a dozen blocks to visit the fine private collection of paintings -- mainly of the sixteenth and seventeenth centuries -- in the Palazzo Doria ( open Sunday, Tuesday, and Thursday, 10:00 to 1:00 ).