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  2. Archimedes - Wikipedia

    en.wikipedia.org/wiki/Archimedes

    In this two-volume treatise addressed to Dositheus, Archimedes obtains the result of which he was most proud, namely the relationship between a sphere and a circumscribed cylinder of the same height and diameter. The volume is ⁠ 4 / 3 ⁠ π r 3 for the sphere, and 2 π r 3 for the cylinder.

  3. Moon Music - Wikipedia

    en.wikipedia.org/wiki/Moon_Music

    Moon Music (full title Music of the Spheres Vol. II: Moon Music) is the tenth studio album by British rock band Coldplay. [2] Released on 4 October 2024 by Parlophone in the United Kingdom and Atlantic Records in the United States, it serves as the second part of their Music of the Spheres project, the first being From Earth with Love (2021).

  4. Mac OS X Panther - Wikipedia

    en.wikipedia.org/wiki/Mac_OS_X_Panther

    Mac OS X Panther (version 10.3) is the fourth major release of macOS, Apple's desktop and server operating system.It followed Mac OS X Jaguar and preceded Mac OS X Tiger.It was released on October 24, 2003, with the retail price of US$129 [3] for a single user and US$199 [3] for a five user, family license.

  5. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    Portable Document Format (PDF), standardized as ISO 32000, is a file format developed by Adobe in 1992 to present documents, including text formatting and images, ...

  6. List of unsolved problems in mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.

  7. Viscosity - Wikipedia

    en.wikipedia.org/wiki/Viscosity

    Viscosity is a measure of a fluid's rate-dependent resistance to a change in shape or to movement of its neighboring portions relative to one another. [1] For liquids, it corresponds to the informal concept of thickness; for example, syrup has a higher viscosity than water. [2]

  8. Parts-per notation - Wikipedia

    en.wikipedia.org/wiki/Parts-per_notation

    Fluorescein aqueous solutions, diluted from 10,000 to 1 parts-per-million in intervals of 10 fold dilution. At 1 ppm the solution is a very pale yellow. As the concentration increases the colour becomes a more vibrant yellow, then orange, with the final 10,000 ppm a deep red colour.

  9. Music of the Spheres World Tour - Wikipedia

    en.wikipedia.org/wiki/Music_of_the_Spheres_World...

    Coldplay announced the tour on 14 October 2021, a day before the release of Music of the Spheres. Similar to the Mylo Xyloto Tour (2011–12), the concerts make extensive use of pyrotechnics and confetti. However, they were adapted to minimise the group's carbon footprint.