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19 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 ...
19 godz. 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: [p 1] [1] [2] The laws of physics are invariant (identical) in all inertial frames of reference ...
19 godz. temu · The timeline of historic inventions is a chronological list of particularly important or significant technological inventions and their inventors, where known. [a] History of technology By technological eras Premodern Prehistoric Stone Age (lithic) Neolithic Revolution Copper Age Bronze Age Iron Age Ancient Modern Proto-industrialization First Industrial Revolution Standardization Second ...
19 godz. temu · Digital media streaming increases the demand for network bandwidth. For example, standard image quality needs 1 Mbit/s link speed for SD 480p, HD 720p quality requires 2.5 Mbit/s, and the top-of-the-line HDX quality needs 4.5 Mbit/s for 1080p. Webcams are a low-cost extension of this phenomenon. While some webcams can give full-frame-rate video ...
19 godz. temu · Brain–computer interface. A brain–computer interface ( BCI ), sometimes called a brain–machine interface ( BMI ), is a direct communication link between the brain 's electrical activity and an external device, most commonly a computer or robotic limb. BCIs are often directed at researching, mapping, assisting, augmenting, or repairing ...
19 godz. temu · Chersky. Dmitry Anuchin, anthropologist and geographer, coined the term anthroposphere, determined the location of the Volga river source; Karl Baer, naturalist, formulated the geological Baer's law on river erosion, co-founder of the Russian Geographical Society; Lev Berg, determined the depth of Central Asian lakes, including Balkhash and Issyk Kul, a head of the Soviet Geographical Society
19 godz. temu · Educational research. Educational technology (commonly abbreviated as edutech, or edtech) is the combined use of computer hardware, software, and educational theory and practice to facilitate learning. [1] [2] When referred to with its abbreviation, "EdTech", it often refers to the industry of companies that create educational technology.
