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18 godz. temu · Hubble's law, also known as the Hubble–Lemaître law, is the observation in physical cosmology that galaxies are moving away from Earth at speeds proportional to their distance. In other words, the farther they are, the faster they are moving away from Earth. The velocity of the galaxies has been determined by their redshift, a shift of the light they emit toward the red end of the visible ...
18 godz. temu · This is described by: = + / where v(t) is the velocity at a time t, a is the acceleration of the spaceship and t is the coordinate time as measured by people on Earth. [p 23] Therefore, after one year of accelerating at 9.81 m/s 2 , the spaceship will be travelling at v = 0.712 c and 0.946 c after three years, relative to Earth.
18 godz. temu · The -sphere with the round metric is an embedded Riemannian submanifold of +.. Let (,) be a Riemannian manifold and let : be an immersed submanifold or an embedded submanifold of .The pullback of is a Riemannian metric on , and (,) is said to be a Riemannian submanifold of (,).. In the case where , the map : is given by () = and the metric is just the restriction of to vectors tangent along .
18 godz. temu · The top speed was expected to be 450 km/h (280 mph) but limited to 200 km/h (124 mph) in built-up areas. In October 2010, the non-maglev Shanghai–Hangzhou High-Speed Railway was opened, bringing travelling time between the two cities down to 45 minutes. Consequently, plans for a Maglev link have been suspended again.
18 godz. temu · Etymology. In the Bible, Golan is mentioned as a city of refuge located in Bashan: Deuteronomy 4:43, Joshua 20:8, 1 Chronicles 6:71. Nineteenth-century authors interpreted the word Golan as meaning "something surrounded, hence a district".. The Greek name for the region is Gaulanîtis (Γαυλανῖτις). In the Mishnah the name is Gablān similar to Aramaic language names for the region ...
