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Hace 14 horas · Dark matter can refer to any substance which interacts predominantly via gravity with visible matter (e.g., stars and planets). Hence in principle it need not be composed of a new type of fundamental particle but could, at least in part, be made up of standard baryonic matter, such as protons or neutrons.
Hace 14 horas · Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result. The others are experimental, meaning that there is a difficulty in creating an experiment to test a proposed theory or investigate a phenomenon in greater detail.
Hace 14 horas · List of Nobel laureates. Nobel laureates receive a gold medal together with a diploma and (as of 2023) 11 million SEK (roughly US $1.0 million, €0.95 million). Nobel laureates of 2012 – Alvin E. Roth, Brian Kobilka, Robert J. Lefkowitz, David J. Wineland, and Serge Haroche – during the ceremony. The Nobel Prizes ( Swedish: Nobelpriset ...
Hace 14 horas · Astrodynamics. In astronomy, Kepler's laws of planetary motion, published by Johannes Kepler between 1609 and 1619, describe the orbits of planets around the Sun. The laws modified the heliocentric theory of Nicolaus Copernicus, replacing its circular orbits and epicycles with elliptical trajectories, and explaining how planetary velocities vary.
27 de abr. de 2024 · Abstract. For 300 years, Fermat’s Last Theorem seemed to be pure arithmetic little connected even to other problems in arithmetic. But the last decades of the twentieth century saw the discovery of very special cubic curves, and the rise of the huge theoretical Langlands Program. The Langlands perspective showed those curves are so special ...
27 de abr. de 2024 · In the latter, physics connects the series to a circle, and this explains the presence of π in the famous formula. Formula-based mathematical thought experiments (Euler’s proof of the Basel problem and Bombelli’s approach to complex numbers) are mathematical thought experiments, because they go beyond the given calculation algorithms.
Hace 14 horas · 23 лютого. У 1100 році помер імператор哲宗 (Zhèzōng) династії Сун. Після його смерті трон успадкував його молодший брат Чжаоцзі (Zhào Jì), який став відомий як імператор Huizong династії Сун. Кількість ...
