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1 giorno fa · Whig. Signature. Sir Isaac Newton FRS (25 December 1642 – 20 March 1726/27 [a]) was an English polymath active as a mathematician, physicist, astronomer, alchemist, theologian, and author who was described in his time as a natural philosopher. [7] He was a key figure in the Scientific Revolution and the Enlightenment that followed.
3 giorni fa · Elephants are the largest living land animals. Three living species are currently recognised: the African bush elephant ( Loxodonta africana ), the African forest elephant ( L. cyclotis ), and the Asian elephant ( Elephas maximus ). They are the only surviving members of the family Elephantidae and the order Proboscidea; extinct relatives ...
2 giorni fa · Diamond. Typically yellow, brown, or gray to colorless. Less often blue, green, black, translucent white, pink, violet, orange, purple, and red. Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Another solid form of carbon known as graphite is the chemically stable form of carbon ...
4 giorni fa · Puyi [c] (7 February 1906 – 17 October 1967) was the last emperor of China, reigning as the eleventh and final monarch of the Qing dynasty. He became emperor at the age of two in 1908, but was forced to abdicate in 1912 as a result of Xinhai Revolution at the age of six. During his first reign, he was known as the Xuantong Emperor, with his ...
4 giorni fa · In mathematics, sine and cosine are trigonometric functions of an angle. The sine and cosine of an acute angle are defined in the context of a right triangle: for the specified angle, its sine is the ratio of the length of the side that is opposite that angle to the length of the longest side of the triangle (the hypotenuse ), and the cosine is ...
2 giorni fa · Many enzymes vital to life contain iron, such as catalase, lipoxygenases, and IRE-BP. [159] Hemoglobin is an oxygen carrier that occurs in red blood cells and contributes their color, transporting oxygen in the arteries from the lungs to the muscles where it is transferred to myoglobin , which stores it until it is needed for the metabolic oxidation of glucose , generating energy. [9]
2 giorni fa · Air pollution is the contamination of air due to the presence of substances called pollutants in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or to materials. [1] It is also the contamination of the indoor or outdoor environment either by chemical, physical, or biological agents ...
