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Há 22 horas · Why is the Sun's corona so much hotter than the Sun's surface? (more unsolved problems in astronomy) The temperature of the photosphere is approximately 6,000 K, whereas the temperature of the corona reaches 1,000,000–2,000,000 K. The high temperature of the corona shows that it is heated by something other than direct heat conduction from the photosphere. It is thought that the energy ...
Há 2 dias · A minute (min) is 60 seconds in length (or, rarely, 59 or 61 seconds when leap seconds are employed), and an hour is 60 minutes or 3600 seconds in length. A day is usually 24 hours or 86,400 seconds in length; however, the duration of a calendar day can vary due to Daylight saving time and Leap seconds .
Há 3 dias · Zürich ( / ˈzjʊərɪk / ZURE-ik, German: [ˈtsyːrɪç] ⓘ; see below) is the largest city in Switzerland and the capital of the canton of Zürich. It is located in north-central Switzerland, [5] at the northwestern tip of Lake Zürich.
11 de mai. de 2024 · Wikipedia is written by volunteer editors and hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other volunteer projects : Commons Free media repository. MediaWiki Wiki software development. Meta-Wiki Wikimedia project coordination. Wikibooks Free textbooks and manuals. Wikidata Free knowledge base.
Há 1 dia · The United Nations headquarters has been situated along the East River in Midtown Manhattan since 1952; in 1945, the United States was a founding member of the UN. The United States has an established structure of foreign relations, and it has the world's second-largest diplomatic corps as of 2024.
Há 1 dia · Plastic. Household items made of various types of plastics. 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 ...
Há 1 dia · Mosab Hassan Yousef – son of Sheikh Hassan Yousef, a Hamas founder and one of its leader. Moussa Dadis Camara – ex-officer of the Guinean army. [279] [280] Muhsin Muhammad – football player for Carolina Panthers [281] Nabeel Qureshi – former Ahmadi Muslim and now co-director of Acts 17 Apologetics Ministries.
