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4 days ago · Overall, we rate Wikipedia Least Biased based on a wide variety of content that often covers pros and cons, right and left. We also rate them Mixed for factual reporting due to possible inaccurate or incomplete entries, as stated by Wikipedia themselves, that may reflect the personal biases of the top editors and a complete lack of transparency ...
6 days ago · We monitor the factual accuracy of what is said by major U.S. political players in the form of TV ads, debates, speeches, interviews and news releases. Our goal is to apply the best practices of both journalism and scholarship, and to increase public knowledge and understanding.” FactCheck.org has won multiple Webby Awards in the Politics category.
2 days ago · The speed of light in vacuum, commonly denoted c, is a universal physical constant that is exactly equal to 299,792,458 metres per second (approximately 300,000 kilometres per second; 186,000 miles per second; 671 million miles per hour).
2 days ago · As of early 2015, high-quality Standard Positioning Service (SPS) GPS receivers provided horizontal accuracy of better than 3.5 meters (11 ft), [7] although many factors such as receiver and antenna quality and atmospheric issues can affect this accuracy.
5 days ago · Atomic clock, type of clock that uses certain resonance frequencies of atoms (usually cesium or rubidium) to keep time with extreme accuracy. The electronic components of atomic clocks are regulated by the frequency of the microwave electromagnetic radiation.
- Jonathan D. Betts
2 days ago · The most accurate timekeeping devices are atomic clocks, which are accurate to seconds in many millions of years, [36] and are used to calibrate other clocks and timekeeping instruments. Atomic clocks use the frequency of electronic transitions in certain atoms to measure the second.
Aug 20, 2024 · speed of light, speed at which light waves propagate through different materials. In particular, the value for the speed of light in a vacuum is now defined as exactly 299,792,458 metres per second.
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