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The Acts of Union 1707 declared that the Kingdom of England and Kingdom of Scotland were "United into One Kingdom by the Name of Great Britain". The term "United Kingdom" has occasionally been used as a description for the former Kingdom of Great Britain, although its official name from 1707 to 1800 was simply "Great Britain".
A value of 9.460 536 207 × 10 15 m found in some modern sources is the product of a mean Gregorian year (365.2425 days or 31 556 952 s) and the defined speed of light (299 792 458 m/s). Another value, 9.460 528 405 × 10 15 m, is the product of the J1900.0 mean tropical year and the defined speed of light.
The lux (symbol: lx) is the unit of illuminance, or luminous flux per unit area, in the International System of Units (SI). [1] [2] It is equal to one lumen per square metre. In photometry , this is used as a measure of the intensity, as perceived by the human eye, of light that hits or passes through a surface.
The impactor's velocity was estimated at 20 kilometers per second (12 mi/s). The kinetic energy of the impact was estimated at 72 teratonnes of TNT (300 ZJ). [31] The impact generated winds in excess of 1,000 kilometers per hour (620 mph) near the blast's center, [32] and produced a transient cavity 100 kilometers (62 mi) wide and 30 kilometers ...
Lightfastness is a property of a colourant such as dye or pigment that describes its resistance to fading when exposed to light. [1] [2] [3] Dyes and pigments are used for example for dyeing of fabrics, plastics or other materials and manufacturing paints or printing inks . The bleaching of the color is caused by the impact of ultraviolet ...
The British thermal unit ( Btu) is a measure of heat, which is a form of energy. It was originally defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. It is also part of the United States customary units. [1] The SI unit for energy is the joule (J); one Btu equals about 1,055 J ...
The live show Nguyễn Ánh 9 - Nửa thế kỷ âm nhạc (Nguyen Anh 9 - Half a century of music) taking place in Hanoi on the night of December 29, 2011. Nine artists and a band with nine members and nine violins coming from Vietnam National Academy of Music joined the second part of the show. Nguyen Anh 9 himself played the piano and ...
The astronomical unit (symbol: au, or AU) is a unit of length defined to be exactly equal to 149,597,870,700 m. Historically, the astronomical unit was conceived as the average Earth-Sun distance (the average of Earth's aphelion and perihelion), before its modern redefinition in 2012.