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Há 14 horas · Dark matter appears to lack a means to lose energy, simply because it is not capable of interacting strongly in other ways except through gravity. The virial theorem suggests that such a particle would not stay bound to the gradually forming object – as the object began to form and compact, the dark matter particles within it would speed up and tend to escape.
Há 14 horas · African National Congress. The African National Congress ( ANC) is a political party in South Africa. It originated as a liberation movement known for its opposition to apartheid and has governed the country since 1994, when the first post-apartheid election resulted in Nelson Mandela being elected as President of South Africa. Cyril Ramaphosa ...
Há 14 horas · When referring to the language spoken by the Pennsylvania Dutch people, Pennsylvania German, it means German. In fact, Germans, in their own language, call themselves Deutsch, (Pennsylvania German: "Deitsch"). Pennsylvania Dutch is a descendant of German in the West Central German dialect family and is closest to Palatine German.
Há 14 horas · Ice An ice block, photographed at the Duluth Canal Park in Minnesota Physical properties Density (ρ) 0.9167 –0.9168 g/cm 3 Refractive index (n) 1.309 Mechanical properties Young's modulus (E) 3400 to 37,500 kg-force /cm 3 Tensile strength (σ t) 5 to 18 kg-force/cm 2 Compressive strength (σ c) 24 to 60 kg-force/cm 2 Poisson's ratio (ν) 0.36 ± 0.13 Thermal properties Thermal conductivity ...
Há 14 horas · Sofia ( / ˈsoʊfiə, ˈsɒf -, soʊˈfiːə / SOH-fee-ə, SOF-; [14] [15] Bulgarian: София, romanized : Sofiya, [16] [17] IPA: [ˈsɔfijɐ] ⓘ) is the capital and largest city of Bulgaria. It is situated in the Sofia Valley at the foot of the Vitosha mountain, in the western part of the country. The city is built west of the Iskar river ...
