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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.
The poem begins: “When I am an old woman, I shall wear purple, with a red hat which doesn't go and doesn't suit me.” Cooper wanted to encourage her friend to grow older in a playful manner. [ 3 ] Cooper repeated the gift to several other friends upon request, and eventually several of the women bought purple outfits and held a tea party on ...
The term is commonly used to mean the simple "divided circle" form, but may refer to any of several schematic diagrams representing these principles, such as the swastika, common to Hinduism, Buddhism, and Jainism.
A depiction of a phoenix by Friedrich Justin Bertuch (1806). The phoenix is an immortal bird that cyclically regenerates or is otherwise born again. While it is part of Greek mythology, it has analogs in many cultures, such as Egyptian and Persian mythology.
Similar to porphyry, purple fabric was extremely difficult to make, as purple required the use of snails to make the dye. [16] The colour itself would have caused the public to remember how they were to behave in the presence of the real emperors wearing the real fabric, with respect bordering on worship for their self-proclaimed god-kings.
For example, to achieve the complement of yellow (a primary color) one could combine red and blue. The result would be purple, which appears directly across from yellow on the color wheel. [3] Continuing with the color wheel model, one could then combine yellow and purple, which essentially means that all three primary colors would be present ...
This can only be used as a very rough guide, for instance if a narrow range of wavelengths within the band 647–700 nm is absorbed, then the blue and green receptors will be fully stimulated, making cyan, and the red receptor will be partially stimulated, diluting the cyan to a greyish hue.
The earliest (1820s–1860s) criminal street gangs in the United States, who were in New York City and were politically aligned with one or the other of the two prominent political parties at the time — the anti-immigrant Nativist, Know Nothing Party, or the Irish immigrant-based Tammany Hall of the Democratic Party — wore distinctive gang colors to differentiate ...