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3 天前 · Titanium is a chemical element; it has symbol Ti and atomic number 22. Found in nature only as an oxide, it can be reduced to produce a lustrous transition metal with a silver color, low density, and high strength, resistant to corrosion in sea water, aqua regia, and chlorine. Titanium was discovered in Cornwall, Great Britain, by William ...
4 天前 · The Andromeda Galaxy is a barred spiral galaxy and is the nearest major galaxy to the Milky Way. It was originally named the Andromeda Nebula and is cataloged as Messier 31, M31, and NGC 224. Andromeda has a D25 isophotal diameter of about 46.56 kiloparsecs (152,000 light-years)[8] and is approximately 765 kpc (2.5 million light-years) from ...
2 天前 · Ultraviolet ( UV) light is electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun. It is also produced by electric arcs, Cherenkov radiation, and ...
4 天前 · The word psychopathy is a joining of the Greek words psyche ( ψυχή) "soul" and pathos ( πάθος) "suffering, feeling". [17] The first documented use is from 1847 in Germany as psychopatisch, [18] and the noun psychopath has been traced to 1885. [19] In medicine, patho- has a more specific meaning of disease (Thus pathology has meant the ...
1 天前 · Coventry City Football Club (commonly known as simply Coventry) is a professional football club based in Coventry, West Midlands, England. The club plays in the EFL Championship, the second tier of English football. The club is nicknamed after the sky blue colours that were part of the clubs early years, before making a return in 1962.[2 ...
