In what country does one kilowatt-hour of electricity causes 1.34 pounds of CO 2 emission?
doc-9193
In the US, one kilowatt-hour (3.6 MJ) of electricity currently causes an average 1.34 pounds (610 g) of CO
2 emission. Assuming the average light bulb is on for 10 hours a day, a 40-watt bulb will cause 196 pounds (89 kg) of CO
2 emission per year. The 6-watt LED equivalent will only cause 30 pounds (14 kg) of CO
2 over the same time span. A building’s carbon footprint from lighting can therefore be reduced by 85% by exchanging all incandescent bulbs for new LEDs if a building previously used only incandescent bulbs.
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doc-9923
C' è un programma ambientale, chiamato Hoy No Circula ("Today Does Not Run", o "One Day without a car"), in cui ai veicoli che non hanno superato le prove sulle emissioni viene impedito di circolare in certi giorni in base alla cifra finale delle loro targhe; questo nel tentativo di ridurre l' inquinamento e la congestione del traffico. Mentre nel 2003 il programma limitava ancora il 40% dei veicoli nell' area metropolitana, con l' adozione di norme più severe sulle emissioni nel 2001 e nel 2006, in pratica oggi la maggior parte dei veicoli sono esenti dalle restrizioni di circolazione a condizione che superino regolarmente i test sulle emissioni.
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doc-17344
In weak basic solutions containing Zn2+ ions, the hydroxide Zn(OH)
2 forms as a white precipitate. In stronger alkaline solutions, this hydroxide is dissolved to form zincates ([Zn(OH)4]2−). The nitrate Zn(NO3)
2, chlorate Zn(ClO3)
2, sulfate ZnSO
4, phosphate Zn
3(PO4)
2, molybdate ZnMoO
4, cyanide Zn(CN)
2, arsenite Zn(AsO2)
2, arsenate Zn(AsO4)
2·8H
2O and the chromate ZnCrO
4 (one of the few colored zinc compounds) are a few examples of other common inorganic compounds of zinc. One of the simplest examples of an organic compound of zinc is the acetate (Zn(O
2CCH3)
2).
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doc-9163
The attainment of high efficiency in blue LEDs was quickly followed by the development of the first white LED. In this device a Y
3Al
5O
12:Ce (known as "YAG") phosphor coating on the emitter absorbs some of the blue emission and produces yellow light through fluorescence. The combination of that yellow with remaining blue light appears white to the eye. However using different phosphors (fluorescent materials) it also became possible to instead produce green and red light through fluorescence. The resulting mixture of red, green and blue is not only perceived by humans as white light but is superior for illumination in terms of color rendering, whereas one cannot appreciate the color of red or green objects illuminated only by the yellow (and remaining blue) wavelengths from the YAG phosphor.
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doc-15763
Molte scuole superiori pubbliche sono situate nel quartiere, tra cui l' elite Bronx High School of Science, Celia Cruz Bronx High School of Music, DeWitt Clinton High School, High School for Violin and Dance, Bronx Leadership Academy 2, Bronx International High School, la Scuola per l' Eccellenza, la Morris Academy for Collaborative Study, Wings Academy per giovani adulti, The Bronx School for Law, Government and Justice, Valid. Il Bronx ospita anche tre delle più prestigiose scuole laiche private di New York City: Fieldston, Horace Mann e Riverdale Country School. Fieldston, Orazio Mann e Riverdale Country School.
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doc-7674
A molecular form called protonated molecular hydrogen (H+
3) is found in the interstellar medium, where it is generated by ionization of molecular hydrogen from cosmic rays. This charged ion has also been observed in the upper atmosphere of the planet Jupiter. The ion is relatively stable in the environment of outer space due to the low temperature and density. H+
3 is one of the most abundant ions in the Universe, and it plays a notable role in the chemistry of the interstellar medium. Neutral triatomic hydrogen H3 can only exist in an excited form and is unstable. By contrast, the positive hydrogen molecular ion (H+
2) is a rare molecule in the universe.
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doc-7678
This reaction is favored at low pressures but is nonetheless conducted at high pressures (2.0  MPa, 20 atm or 600 inHg). This is because high-pressure H
2 is the most marketable product and Pressure Swing Adsorption (PSA) purification systems work better at higher pressures. The product mixture is known as "synthesis gas" because it is often used directly for the production of methanol and related compounds. Hydrocarbons other than methane can be used to produce synthesis gas with varying product ratios. One of the many complications to this highly optimized technology is the formation of coke or carbon:
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doc-9618
Il mandolino è stato ampiamente utilizzato nella musica tradizionale di Inghilterra e Scozia per generazioni. Simon Mayor è un importante giocatore britannico che ha prodotto sei album solisti, libri di istruzione e DVD, così come le registrazioni con il suo quartetto mandolino i mandolini mandolini. Lo strumento ha anche trovato la sua strada nella musica rock britannica. Il mandolino è stato suonato da Mike Oldfield (e introdotto da Vivian Stanshall) sull' album di Oldfield Tubular Bells, così come su alcuni dei suoi album successivi[particolarmente in primo piano su Hergest Ridge (1974) e Ommadawn (1975)]. E' stato ampiamente utilizzato dal gruppo britannico di folk-rock Lindisfarne, con due membri dello strumento, Ray Jackson e Simon Cowe, e il cui "Fog on the Tyne" è stato il più venduto nel Regno Unito album del 1971-1972. Lo strumento è stato ampiamente utilizzato anche nel revival folk britannico degli anni' 60 e' 70 con band come Fairport Convention e Steeleye Span che lo hanno assunto come strumento principale in molte delle loro canzoni. Maggie May di Rod Stewart, che ha colpito No. 1 su entrambe le classifiche britanniche e la Billboard Hot 100, ha presentato anche il gioco di Jackson. E' stato utilizzato anche da altri musicisti rock britannici. John Paul Jones, bassista di Led Zeppelin, è un completo musicista mandolino e ha registrato numerose canzoni su mandolino tra cui Andare in California e That's the Way; la parte mandolino di The Battle of Evermore è suonata da Jimmy Page, che ha composto la canzone. Altre canzoni Led Zeppelin con mandolino sono Hey Hey Hey What Can I Do, e Black Country Woman. Pete Townshend of The Who ha giocato mandolino sulla pista Mike Post Theme, insieme a molte altre tracce su Endless Wire. McGuinness Flint, per il quale Graham Lyle ha suonato il mandolino sul loro singolo di maggior successo, When I' m Dead And Gone, è un altro esempio. Lyle è stato anche brevemente un membro di Slim Chance di Ronnie Lane, e ha giocato mandolino sul loro successo How Come Come. Uno dei primi mandolini più importanti nella musica popolare era Robin Williamson in The Incredible String Band. Ian Anderson di Jethro Tull è un musicista mandolino altamente compiuto (bella traccia Pussy Willow), come il suo chitarrista Martin Barre. La canzone popolare Please Please Please Please Let Please Me Get What I Want by The Smiths presentava un solo mandolino suonato da Johnny Marr. Più recentemente, la band di Glasgow Sons and Daughters ha presentato il mandolino, suonato da Ailidh Lennon, su brani come Fight, Start to End e Medicine. Le icone folk-punk britanniche dei Levellers usano regolarmente anche il mandolino nelle loro canzoni. Anche le attuali band stanno iniziando ad usare il Mandolin e il suo suono unico - come l' Indigo Moss di South London che lo usa durante le loro registrazioni e concerti dal vivo. Il mandolino è stato presente anche nell' esecuzione di Matthew Bellamy nella rock band Muse. Costituisce anche la base del successo di Paul McCartney 2007 "Dance Tonight". Non era la prima volta che un Beatle suonava un mandolino, tuttavia, questa distinzione va a George Harrison su Gone Troppo, il titolo tratto dall' omonimo album del 1982. Il mandolino è insegnato in Lanarkshire dal Lanarkshire Guitar e Mandolin Association per oltre 100 persone. Anche più recentemente il supergruppo hard rock Them Crooked Vultures ha suonato una canzone basata principalmente su un mandolino.
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doc-7686
Large quantities of H
2 are needed in the petroleum and chemical industries. The largest application of H
2 is for the processing ("upgrading") of fossil fuels, and in the production of ammonia. The key consumers of H
2 in the petrochemical plant include hydrodealkylation, hydrodesulfurization, and hydrocracking. H
2 has several other important uses. H
2 is used as a hydrogenating agent, particularly in increasing the level of saturation of unsaturated fats and oils (found in items such as margarine), and in the production of methanol. It is similarly the source of hydrogen in the manufacture of hydrochloric acid. H
2 is also used as a reducing agent of metallic ores.
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doc-7823
Imperial College TV
ICTV (formerly STOIC (Student Television of Imperial College)) is Imperial College Union's TV station, founded in 1969 and operated from a small TV studio in the Electrical Engineering block. The department had bought an early AMPEX Type A 1-inch videotape recorder and this was used to produce an occasional short news programme which was then played to students by simply moving the VTR and a monitor into a common room. A cable link to the Southside halls of residence was laid in a tunnel under Exhibition Road in 1972. Besides the news, early productions included a film of the Queen opening what was then called College Block and interview programmes with DJ Mike Raven, Richard O'Brian and Monty Python producer Ian MacNaughton. The society was renamed to ICTV for the start of the 2014/15 academic year.
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doc-16716
Normal functioning of the kidney, brain, liver, heart, and other systems can be affected by uranium exposure, because, besides being weakly radioactive, uranium is a toxic metal. Uranium is also a reproductive toxicant. Radiological effects are generally local because alpha radiation, the primary form of 238U decay, has a very short range, and will not penetrate skin. Uranyl (UO2+
2) ions, such as from uranium trioxide or uranyl nitrate and other hexavalent uranium compounds, have been shown to cause birth defects and immune system damage in laboratory animals. While the CDC has published one study that no human cancer has been seen as a result of exposure to natural or depleted uranium, exposure to uranium and its decay products, especially radon, are widely known and significant health threats. Exposure to strontium-90, iodine-131, and other fission products is unrelated to uranium exposure, but may result from medical procedures or exposure to spent reactor fuel or fallout from nuclear weapons. Although accidental inhalation exposure to a high concentration of uranium hexafluoride has resulted in human fatalities, those deaths were associated with the generation of highly toxic hydrofluoric acid and uranyl fluoride rather than with uranium itself. Finely divided uranium metal presents a fire hazard because uranium is pyrophoric; small grains will ignite spontaneously in air at room temperature.
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