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1 dzień temu · In physics, the special theory of relativity, or special relativity for short, is a scientific theory of the relationship between space and time.In Albert Einstein's 1905 treatment, the theory is presented as being based on just two postulates:. The laws of physics are invariant (identical) in all inertial frames of reference (that is, frames of reference with no acceleration).
1 dzień temu · The Cold War was a period of geopolitical tension between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc, that started in 1947, two years after the end of World War II and lasted to 1991, the fall of the Soviet Union.. The term cold war is used because there was no large-scale fighting directly between the two superpowers, but they ...
1 dzień temu · The Abbasid Caliphate or Abbasid Empire (/ ə ˈ b æ s ɪ d, ˈ æ b ə s ɪ d /; Arabic: الْخِلَافَة الْعَبَّاسِيَّة, romanized: al-Khilāfa al-ʿAbbāsiyya) was the third caliphate to succeed the Islamic prophet Muhammad.It was founded by a dynasty descended from Muhammad's uncle, Abbas ibn Abd al-Muttalib (566–653 CE), from whom the dynasty takes its name.
1 godzinę temu · The tiger (Panthera tigris) is a member of the genus Panthera and the largest living cat species native to Asia.It has a powerful, muscular body with a large head and paws, a long tail and orange fur with black, mostly vertical stripes. It is traditionally classified into nine recent subspecies, though some recognise only two subspecies, mainland Asian tigers and the island tigers of the Sunda ...
1 dzień temu · The claim is unsupported by facts, as by the time the documents were supposedly created, two people from the eight in the Tukhachevsky group were already imprisoned, and by the time the document was said to reach Stalin the purging process was already underway. However the actual evidence introduced at trial was obtained from forced confessions.
1 dzień temu · India, officially the Republic of India (ISO: Bhārat Gaṇarājya), is a country in South Asia.It is the seventh-largest country by area; the most populous country as of June 2023; and from the time of its independence in 1947, the world's most populous democracy. Bounded by the Indian Ocean on the south, the Arabian Sea on the southwest, and the Bay of Bengal on the southeast, it shares land ...
1 dzień temu · A metal (from Ancient Greek μέταλλον (métallon) 'mine, quarry, metal') is a material that when polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. These properties are all associated with having electrons available at the Fermi level, as against nonmetallic materials which do not. [1] : .
