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18 godz. temu · t. e. 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: [p 1] [1] [2] The laws of physics are invariant (identical) in all inertial frames of ...
18 godz. temu · SDI was not just lasers; in this Kinetic Energy Weapon test, a 0.25-ounce (7 g) Lexan projectile was fired from a light-gas gun at a velocity of 23,000 feet per second (7,000 m/s; 16,000 mph) at a cast aluminum block. Historians from the Missile Defense Agency attribute the term "Star Wars" to a Washington Post article published March 24, 1983.
