When the chloride ions have sufficient velocity, the energy of the resulting iodide ions after the collision is much lower than expected, and it is theorized that energy is lost as a result of a full roundabout of the methyl group around the iodine atom before the actual displacement takes place.

When the M65 was extended, a slip road was built at Walton Summit, southeast of Preston, from the roundabout linking junction 9 of the M61 with junction 2 of the M65 to the Walton Summit industrial estate.

When the roundabout complex was first opened, the mini-roundabouts were not permanently marked out and could be reconfigured while the layout was fine tuned.

When the new junction was first opened, a camera was placed overlooking the roundabout on the roof of the adjacent Kodak HQ building.

When Western Avenue was originally built, it ended at a point west of Uxbridge at the intersection of the road from Uxbridge towards Gerrards Cross and High Wycombe ( the old Oxford Road ) with the road from Slough ; a conventional roundabout was constructed to replace the former tee-junction where the older roads joined.

When the M40 towards High Wycombe was built, Western Avenue was extended at high level to make an end-on join with the motorway, and a larger roundabout was built below the bridges carrying the motorway.

When first laid out, the roundabout had the traffic going round it clockwise in the usual way, but as traffic volumes built up the layout was altered so that the traffic moved round the roundabout in both directions ( so as to make the roundabout a kind of very small ring road ) with mini-roundabouts at the points where other roads join the main roundabout.

When the Stamford Bypass was first built in October 1960, the bypass terminated with a roundabout at Tickencote, with the B1081, and the dual-carriageway continued a half-mile north near Tickencote Park.

When he retired he sold the roundabout to the Ulster Folk and Transport Museum.

When word of his aspirations to make himself king reached the Helvetii, Orgetorix was summoned to stand trial, facing execution on the pyre should he be found guilty.

When Brown was hanged without incident, Booth stood in uniform near the scaffold and afterwards expressed great satisfaction with Brown's fate, although he admired the condemned man's bravery in facing death stoically.

When the Force is attached, either to the front or back, it acts as a weapons system and will fire in whatever direction it is facing.

When one stands within Stonehenge, facing north-east through the entrance towards the heel stone, one sees the sun rise above the stone at summer solstice.

When a body ( body 1 ) is acted on by the gravity of another body ( body 2 ), the field can vary significantly on body 1 between the side of the body facing body 2 and the side facing away from body 2.

When Styrbjörn brought this fleet to Uppsala to claim the throne of Sweden, Harald broke his oath and fled with his Danes in order to avoid facing the Swedish army at the Battle of Fýrisvellir.

When facing the “ Savoy building ”, looking East, from the street at Lenox Avenue and

When flies mate, the male initially flies on top of the female, facing in the same direction, but then turns round to face in the opposite direction.

When facing toward the sun, clerestories and other windows may admit unacceptable glare.

When facing the giant Talos, some accounts say Medea drugged the bronze giant and Poeas shot an arrow to poison him in his heel.

When hit into the curved brick facing of the stand, the ball rebounded at high speed and varying angles — and Bradman would attempt to hit it again.

When they are on or above the middle line, they are drawn with stems on the left of the note head, facing down.

When they are on or above the middle line, they are drawn with stems on the left of the note head, facing down.

When facing the water, a visitor would see the mouth of Dames Quarter Creek.

When the wheels reach the switch, the wheels are guided along the route determined by which of the two points is connected to the track facing the switch.

When Kirk talked with his double directly, two separate takes of Shatner facing opposite directions were combined, with the camera motion carefully controlled so that the resulting image looked realistic.

When Henry was facing war with his sons in 1173, William was appointed as sheriff of Herefordshire at Easter.

When King Afonso I of Kongo whose Kongo name was Mvemba a Nzinga, the second Christian king, was facing a rival, his brother Mpanzu a Kitima, in battle, he reported that a vision of Saint James and the Heavenly Host appeared in the sky, frightened Mpanzu a Kitima's soldiers, and gave Afonso the victory.

When skiing in thick powder it is important that the skier not lean back ; staying forward and facing downhill allows quicker response to changing conditions.

When I was facing a camera I pretended that neither it nor the photographer were there.

When the Soyuz started aerobraking in the upper reaches of the atmosphere, the combined spacecraft sought the most aerodynamically stable position-nose forward, with the heavy descent module facing directly into the air stream with only its light metal entry hatch at the front to protect it.

When a person is standing in the medical anatomical position ( where the palm is facing to the front ), the thumb is the outer-most digit.

When the king of the Franks was on the hill with that band, they made a formidable charge against the Muslims facing them, so that they drove them back to my father.

When he attempted to attack the main spine at Tunnel Hill, his troops were repeatedly repulsed by Patrick Cleburne's heavy division, the best unit in Braxton Bragg's army.

When the George Rogers Clark Council, which owned the property, merged with Old Kentucky Home Council, one of the conditions was that Tunnel Mill would not be closed.

When the line opened the final passenger section from Edge Hill to Crown Street railway station was cable hauled as was the section down the Wapping Tunnel.

When the New York and Jersey Tunnel Company resumed construction on the tunnels in 1902, they employed a different method of tunneling using tubular cast iron plating.

When no one else was around to observe, a key Time Tunnel scientist, young physicist Dr. Anthony Newman ( James Darren ), turns the machine on and sends himself back in time in an attempt to prove that the Time Tunnel project funds were not wasted.

When the Channel Tunnel was ready for construction, it was decided to complete the M20 between junctions 8 and 9 and this opened in 1991.

When an expressway needed to be built downtown, the terms forced the Lytle Tunnel to be built under the park to preserve it.

* When the Baytown Tunnel was removed in 1997 to allow deepening and widening of the Houston Ship Channel ( it was replaced by the Fred Hartman Bridge ), it was the largest tunnel so removed ( 35 ' diameter by 1, 041 ' length ) without closing the Channel, losing time due to accidents, or impacting the navigational safety of the Port.

When non-urban road tunnels are included, the Dublin Port Tunnel is shorter than some other European tunnels, such as the Lærdal Tunnel () in Norway ( 24. 5 km ), the Gotthard Road Tunnel in Switzerland ( 17 km ), the Mont Blanc Tunnel between France and Italy ( 11. 6 km ) and the Western Scheldt Tunnel () in The Netherlands ( 6. 6 km ).

When the road passes through the Tunnel du Fayet, there are openings cut into the tunnel to afford a view.

When constructed, it was only the third underwater vehicular tunnel constructed in the United States ( after the Holland Tunnel between Jersey City, New Jersey, and downtown Manhattan, New York City, New York and the Posey Tube between Oakland and Alameda, California ).

When it opened, the tunnel was the longest and second-deepest subsea tunnel in Europe and Norway, after the Hitra Tunnel.

When the A1 was re-routed through the Tyne Tunnel, it was renumbered as the A6127 ( M )-becoming one of only two four-digit, Axxxx ( M ) motorways, the other being the A6144 ( M ) road.

Batt was then commissioned to write the official anthem for the inauguration of the Channel Tunnel by the Queen, entitled " When Flags Fly Together ".

When completed, the Blue Ridge Tunnel was the longest in the United States and one of the longest tunnels in the world, a remarkable feat of engineering.

( When Brunel, for instance, first surveyed the GWR, he planned to use cable assistance in the Box Tunnel.

When the Muni Metro system and Market Street Subway was built, it was connected to the Twin Peaks Tunnel to be used by the K Ingleside, L Taraval and M Ocean View lines.

When the Eisenhower Tunnel opened in March 1973, it allowed motorists on Interstate 70 to avoid crossing the pass directly.

When the Colorado-Big Thompson ( C-BT ) project is diverting water to northeastern Colorado, water collected in Lake Granby can be pumped back into Shadow Mountain where it flows backward into Grand Lake, then under Rocky Mountain National Park and the Continental Divide via the Alva B. Adams Tunnel to the Big Thompson River on the eastern slope of the Rocky Mountains.