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  2. Borromean rings - Wikipedia

    en.wikipedia.org/wiki/Borromean_rings

    The Borromean rings have been used in different contexts to indicate strength in unity. [14] In particular, some have used the design to symbolize the Trinity. [3] A 13th-century French manuscript depicting the Borromean rings labeled as unity in trinity was lost in a fire in the 1940s, but reproduced in an 1843 book by Adolphe Napoléon Didron.

  3. Hodograph - Wikipedia

    en.wikipedia.org/wiki/Hodograph

    The study of the hodograph, as a method of investigating the motion of a body, was introduced by Sir W. R. Hamilton. The hodograph may be defined as the path traced out by the extremity of a vector which continually represents, in direction and magnitude, the velocity of a moving body.

  4. Three-dimensional space - Wikipedia

    en.wikipedia.org/wiki/Three-dimensional_space

    A sphere in 3-space (also called a 2-sphere because it is a 2-dimensional object) consists of the set of all points in 3-space at a fixed distance r from a central point P. The solid enclosed by the sphere is called a ball (or, more precisely a 3-ball). The volume of the ball is given by

  5. Free body diagram - Wikipedia

    en.wikipedia.org/wiki/Free_body_diagram

    Block on a ramp and corresponding free body diagram of the block.. In physics and engineering, a free body diagram (FBD; also called a force diagram) [1] is a graphical illustration used to visualize the applied forces, moments, and resulting reactions on a free body in a given condition.

  6. Geometry - Wikipedia

    en.wikipedia.org/wiki/Geometry

    The Math Forum – College Geometry; The Math Forum – Advanced Geometry; Nature Precedings – Pegs and Ropes Geometry at Stonehenge; The Mathematical Atlas – Geometric Areas of Mathematics "4000 Years of Geometry", lecture by Robin Wilson given at Gresham College, 3 October 2007 (available for MP3 and MP4 download as well as a text file)

  7. Sigmoid function - Wikipedia

    en.wikipedia.org/wiki/Sigmoid_function

    Titration curves between strong acids and strong bases have a sigmoid shape due to the logarithmic nature of the pH scale. The logistic function can be calculated efficiently by utilizing type III Unums .

  8. California mother, teen son found beaten to death in home as ...

    www.aol.com/california-mother-teen-son-found...

    The bodies of a California mother of three and her 19-year-old son were found dead by her daughter days before the family was set to celebrate Christmas.

  9. Parabolic arch - Wikipedia

    en.wikipedia.org/wiki/Parabolic_arch

    A simple hanging rope bridge describes a catenary, but if they were in the form of a suspension bridges they usually describe a parabola in shape, with the roadway hanging from the inverted arch. Modern suspension bridges were built from the early 19th century, beginning with chains and progressing to more and more elegant steel rope examples ...