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Hace 1 día · Silver is a chemical element; it has symbol Ag (from Latin argentum 'silver', derived from Proto-Indo-European *h₂erǵ 'shiny, white' )) and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. [8]
Hace 3 días · Since 2007, India has set its official threshold at ₹ 26 a day ($0.43) in rural areas and about ₹ 32 per day ($0.53) in urban areas. [46] While these numbers are lower than the World Bank's $1.25 per day income -based definition, the definition is similar to China's US$0.65 per day official poverty line in 2008.
Hace 2 días · Plastics are a wide range of synthetic or semi-synthetic materials that use polymers as a main ingredient. Their plasticity makes it possible for plastics to be molded, extruded or pressed into solid objects of various shapes. This adaptability, plus a wide range of other properties, such as being lightweight, durable, flexible, and inexpensive ...
Hace 2 días · Permafrost (from perma- ' permanent ', and frost) is soil or underwater sediment which continuously remains below 0 °C (32 °F) for two years or more: the oldest permafrost had been continuously frozen for around 700,000 years. [1] While the shallowest permafrost has a vertical extent of below a meter (3 ft), the deepest is greater than 1,500 ...
Hace 3 días · t. e. The 2014 United States Senate election in Virginia was held on November 4, 2014, to elect a member of the United States Senate to represent the Commonwealth of Virginia, concurrently with other elections to the United States Senate, elections to the United States House of Representatives, and various state and local elections .
23 de may. de 2024 · For protected regions of environmental or cultural value in general, see protected area. Marine protected areas as of November 2022 (data from MPAtlas). [1] Marine protected areas (MPAs) are protected areas of the world's seas, oceans, estuaries or in the US, the Great Lakes. [2] These marine areas can come in many forms ranging from wildlife ...
Hace 1 día · It is one of several greenhouse gases in the atmosphere of Earth. The current global average concentration of carbon dioxide (CO 2) in the atmosphere is 421 ppm as of May 2022 (0.04%). [1] This is an increase of 50% since the start of the Industrial Revolution, up from 280 ppm during the 10,000 years prior to the mid-18th century.
