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14 hours ago · Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula SiO2, commonly found in nature as quartz. [5] [6] In many parts of the world, silica is the major constituent of sand. Silica is abundant as it comprises several minerals and synthetic products.
14 hours ago · Renewable energy portal. v. t. e. Renewable energy (or green energy) is energy from renewable natural resources that are replenished on a human timescale. The most widely used renewable energy types are solar energy, wind power and hydropower. Bioenergy and geothermal power are also significant in some countries.
14 hours ago · Friedrich Engels in 1877. Marxism seeks to explain social phenomena within any given society by analysing the material conditions and economic activities required to fulfill human material needs. It assumes that the form of economic organisation, or mode of production, influences all other social phenomena, including broader social relations ...
14 hours ago · Antimony is a member of group 15 of the periodic table, one of the elements called pnictogens, and has an electronegativity of 2.05. In accordance with periodic trends, it is more electronegative than tin or bismuth, and less electronegative than tellurium or arsenic.
14 hours ago · A brand is a name, term, design, symbol or any other feature that distinguishes one seller's good or service from those of other sellers. Brands are used in business, marketing, and advertising for recognition and, importantly, to create and store value as brand equity for the object identified, to the benefit of the brand's customers, its owners and shareholders.
14 hours ago · South Korea's presidential office said Russia's military assistance to the North would have a negative impact on relations between Seoul and Moscow.
14 hours ago · Communism (from Latin communis, 'common, universal') [1] [2] is a left-wing to far-left sociopolitical, philosophical, and economic ideology within the socialist movement, [1] whose goal is the creation of a communist society, a socioeconomic order centered around common ownership of the means of production, distribution, and exchange that ...
