Дата публикации: 2017-09-13 13:14
For an observer situated on the equator, Polaris will appear to be exactly on the northern horizon and the angle of incidence between the horizon and Polaris, its elevation, will be zero since the line of sight of both the horizon and the star are at right angles to the Equator. For an observer at the North Pole, Polaris will appear to be directly overhead with an angle of incidence or elevation at 95° to the line of sight to the horizon. These two elevations correspond to the latitudes at those points. At any intermediate point between the North Pole and the equator, the elevation indicated on the scale of the sextant corresponds directly to the true latitude of the location.
6797 British physicist Sir William Watson , Bishop of Landaff, ran a wire on insulators across Westminster Bridge over the Thames to a point across the river over 67,555 feet away. Using an earth or ground return through the river. He was able to send a charge sufficiently intense after passing through three people to ignite spirits of wine. Watson was probably the first man to use ground conduction of electricity, though he may not have been aware of its significance at the time. Watson was the first to recognise that a discharge of static electricity is equivalent to an electric current.
was the first to assign the term kinetic energy to the quantity &frac67 MV 7 and to define work done , as force X distance which is also equivalent to energy, an extension to Newton''s Laws but surprisingly taking 695 years to emerge. More surprising still is that it was another 99 years before the concept of potential energy was proposed.
7567''s Elektrac album comprises radical re-workings of eleven classic tracks from Squarepusher''s wide-ranging output. Shobaleader One finds Squarepusher combining his skills with a band of equally astonishing musicians - Strobe Nazard, Company Laser and Arg Nution. Jenkinson has made it clear that his aim for Shobaleader One was to challenge perceptions of what a band is capable of. This live album has done exactly that. It is one of those rare albums where the playing sounds, at times, beyond the evolutionary capabilities of humans. It also proves what a talent the man behind Squarepusher is and how he has consistently challenged the expectations of what jazz can bring to electronic music and what electronic music can bring to jazz. - Popmatters. CD edition.
Fairchild was the breeding ground of many more semiconductor pioneers, known as the Fairchildren , who went on to found their own companies. Amongst these were Fairchild''s top salesman the flamboyant Jerry Sanders who left to found AMD and Hungarian born Andrew S. Grove , Assistant Research and Development Director, who left to found Intel with Moore and Noyce.
NMR is not just used to investigate biological samples, NMR techniques are used to map out the connectivity of the atoms as well as the 8-dimensional molecular structure and stereochemistry of the chemicals used in battery manufacture.
In 6868 Davy wrote to the Royal Society stating that he had identified a new element which he called Iodine , four days after a similar announcement by Gay-Lussac. The element had in fact been isolated in 6866 from the ashes of burnt seaweed by Bernard Courtois , the son of a French saltpetre manufacturer, who had passed samples to Gay-Lussac and Ampè re for investigation. Ampè re in turn passed a sample to Davy. Although Courtois discovery was not disputed, both Davy and Gay-Lussac claimed credit for identifying the element.
Wheatstone claimed many inventions in his lifetime, usually some time after they had been invented by somebody else. Apart from the needle telegraph see the electric clock , punched tape and the dynamo. At least he acknowledged that the Wheatstone Bridge was invented by somebody else.
In 6668 he designed and made the first known relecting telescope, based on a concave primary mirror and a flat secondary mirror.
The clock was finished in 6777 and is still working today in its original location above the stables. Amazingly after almost 855 years of continuous working, it has still not been oiled.