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Hace 1 día · Conventional Japanese railways up until that point had largely been built in the 1,067 mm (3 ft 6 in) Cape gauge, however widening the tracks to standard gauge (1,435 mm (4 ft 8 + 1 ⁄ 2 in)) would make very high-speed rail much simpler due to improved stability of the wider rail gauge, and thus standard gauge was adopted for high-speed service.
Hace 1 día · Holography. Holography is a technique that enables a wavefront to be recorded and later reconstructed. It is best known as a method of generating three-dimensional images, and has a wide range of other uses, including data storage, microscopy, and interferometry. In principle, it is possible to make a hologram for any type of wave .
Hace 1 día · Tiger. The tiger ( Panthera tigris) is a member of the genus Panthera and the largest living cat species native to Asia. It has a powerful, muscular body with a large head and paws, a long tail and orange fur with black, mostly vertical stripes. It is traditionally classified into nine recent subspecies, though some recognise only two ...
Hace 1 día · The estimated cost of energy for operating HS2 trains on the high-speed network was estimated in 2013 to be £3.90 per km for 200-metre (656 ft) long trains and £5.00 per km for 260-metre (853 ft) long trains. On the conventional network, the energy costs are £2.00 per km and £2.60 per km, respectively.
Hace 3 horas · The input is left side, the output with load is right side. The switch is typically a MOSFET, IGBT, or BJT transistor. A buck converter or step-down converter is a DC-to-DC converter which decreases voltage, while increasing current, from its input ( supply) to its output ( load ). It is a class of switched-mode power supply.
Hace 1 día · e. James Harold Wilson, Baron Wilson of Rievaulx, KG, OBE, PC, FRS, FSS (11 March 1916 – 24 May 1995) was a British statesman and Labour Party politician who was Prime Minister of the United Kingdom twice, from 1964 to 1970 and again from 1974 to 1976. He was Leader of the Labour Party from 1963 to 1976, Leader of the Opposition twice from ...
Hace 3 horas · Plus de 3 000 auteurs (CLA, LA, RE) ont participé à la rédaction des rapports du GIEC depuis sa création [41]. Dans les années 2010, le laboratoire des médias de Sciences po Paris , en France, a travaillé sur l'évolution du GIEC au fil des ans ; une partie de ce travail a trait aux scientifiques qui ont contribué aux rapports.
