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  2. Horse collar - Wikipedia

    en.wikipedia.org/wiki/Horse_collar

    The collar allows the horse to use its full strength when pulling, essentially enabling the animal to push forward with its hindquarters into the collar. If wearing a yoke or a breastcollar, the horse had to pull with its less-powerful shoulders. The collar had another advantage over the yoke as it reduced pressure on the horse's windpipe.

  3. Spectrophotometry - Wikipedia

    en.wikipedia.org/wiki/Spectrophotometry

    Spectrophotometry is a tool that hinges on the quantitative analysis of molecules depending on how much light is absorbed by colored compounds.

  4. Wikipedia, the free encyclopedia

    en.wikipedia.org/wiki/Main_page

    Explore millions of articles on any topic from the world's largest online encyclopedia.

  5. Dispersive prism - Wikipedia

    en.wikipedia.org/wiki/Dispersive_prism

    A ray trace through a prism with apex angle α. Regions 0, 1, and 2 have indices of refraction, , and , and primed angles ′ indicate the ray's angle after refraction.. Ray angle deviation and dispersion through a prism can be determined by tracing a sample ray through the element and using Snell's law at each interface.

  6. Accretionary wedge - Wikipedia

    en.wikipedia.org/wiki/Accretionary_wedge

    An accretionary wedge or accretionary prism forms from sediments accreted onto the non-subducting tectonic plate at a convergent plate boundary. Most of the material in the accretionary wedge consists of marine sediments scraped off from the downgoing slab of oceanic crust , but in some cases the wedge includes the erosional products of ...

  7. Yoga - Wikipedia

    en.wikipedia.org/wiki/Yoga

    Yoga is a cognate of the English word "yoke". [32] According to Mikel Burley, the first use of the root of the word "yoga" is in hymn 5.81.1 of the Rigveda, a dedication to the rising Sun-god, where it has been interpreted as "yoke" or "control". [33] [34] [note 2]

  8. Stole (vestment) - Wikipedia

    en.wikipedia.org/wiki/Stole_(vestment)

    In fact, in many places the stole is called the orarium. Therefore, it is linked to the napkin used by Christ in washing the feet of his disciples, and is a fitting symbol of the yoke of Christ, the yoke of service. The most likely origin for the stole, however, is to be connected with the scarf of office among Imperial officials in the Roman ...

  9. Mongol invasion of Kievan Rus' - Wikipedia

    en.wikipedia.org/wiki/Mongol_invasion_of_Kievan_Rus'

    The Mongol Empire invaded and conquered much of Kievan Rus' in the mid-13th century, sacking numerous cities including the largest: Kiev (50,000 inhabitants) and Chernigov (30,000 inhabitants).