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Ning Li (physicist) Ning Li (Chinese: 李宁, pinyin: Lǐ Níng; January 14, 1943 – July 27, 2021) was a Chinese American scientist. Born in Shandong, she graduated from the Department of Physics of Peking University, and in 1983 she emigrated with her family from China to the United States. [1] She is known for her physics and anti-gravity ...
Eugene Podkletnov. Eugene Podkletnov ( Russian: Евгений Подклетнов, Yevgeny Podkletnov) is a Russian ceramics engineer known for his claims made in the 1990s of designing and demonstrating gravity shielding devices consisting of rotating discs constructed from ceramic superconducting materials.
Anti-gravity (also known as non-gravitational field) is a hypothetical phenomenon of creating a place or object that is free from the force of gravity. It does not refer to either the lack of weight under gravity experienced in free fall or orbit, or to balancing the force of gravity with some other force, such as electromagnetism and ...
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According to the story, Galileo discovered through this experiment that the objects fell with the same acceleration, proving his prediction true, while at the same time disproving Aristotle 's theory of gravity (which states that objects fall at speed proportional to their mass). Most historians consider it to have been a thought experiment ...
Adm. William H. McRaven is collaborating with daughter Kelly McRaven on a follow-up to his bestselling “Skipper the Seal” picture book that draws upon his onetime passion for being a superhero.
Gravity. Trajectory of a ball bouncing at an angle of 70° after impact without drag , with Stokes drag , and with Newton drag . The gravitational force is directed downwards and is equal to [4] where m is the mass of the ball, and g is the gravitational acceleration, which on Earth varies between 9.764 m/s 2 and 9.834 m/s2. [5]
Equations for a falling body. A set of equations describing the trajectories of objects subject to a constant gravitational force under normal Earth -bound conditions. Assuming constant acceleration g due to Earth’s gravity, Newton's law of universal gravitation simplifies to F = mg, where F is the force exerted on a mass m by the Earth’s ...