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  2. British undergraduate degree classification - Wikipedia

    en.wikipedia.org/wiki/British_undergraduate...

    The British undergraduate degree classification system is a grading structure used for undergraduate degrees or bachelor's degrees and integrated master's degrees in the United Kingdom. The system has been applied, sometimes with significant variation, in other countries and regions. The UK's university degree classification system, established ...

  3. Time dilation - Wikipedia

    en.wikipedia.org/wiki/Time_dilation

    Daily time dilation (gain or loss if negative) in microseconds as a function of (circular) orbit radius r = rs/re, where rs is satellite orbit radius and re is the equatorial Earth radius, calculated using the Schwarzschild metric. At r ≈ 1.497 [Note 1] there is no time dilation. Here the effects of motion and reduced gravity cancel.

  4. History of timekeeping devices - Wikipedia

    en.wikipedia.org/wiki/History_of_timekeeping_devices

    An Egyptian method of determining the time during the night, used from at least 600 BC, was a type of plumb-line called a merkhet. A north–south meridian was created using two merkhets aligned with Polaris, the north pole star. The time was determined by observing particular stars as they crossed the meridian. [24]

  5. The Large Scale Structure of Space–Time - Wikipedia

    en.wikipedia.org/wiki/The_Large_Scale_Structure...

    ISBN. 978-0521200165. The Large Scale Structure of SpaceTime is a 1973 treatise on the theoretical physics of spacetime by the physicist Stephen Hawking and the mathematician George Ellis. [1] It is intended for specialists in general relativity rather than newcomers. [2]

  6. Time–space compression - Wikipedia

    en.wikipedia.org/wiki/Timespace_compression

    Timespace compression. Timespace compression (also known as spacetime compression and timespace distanciation) is an idea referring to the altering of the qualities of spacetime and the relationship between space and time that is a consequence of the expansion of capital. It is rooted in Karl Marx 's notion of the "annihilation ...

  7. Spacetime - Wikipedia

    en.wikipedia.org/wiki/Spacetime

    In physics, spacetime, also called the space-time continuum, is a mathematical model that fuses the three dimensions of space and the one dimension of time into a single four-dimensional continuum. Spacetime diagrams are useful in visualizing and understanding relativistic effects, such as how different observers perceive where and when events ...

  8. Time in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Time_in_the_United_Kingdom

    The IANA time zone database contains one zone for the United Kingdom in the file zone.tab, named Europe/London. This refers to the area having the ISO 3166-1 alpha-2 country code "GB". The zone names Europe/Guernsey, Europe/Isle_of_Man and Europe/Jersey exist because they have their own ISO 3166-1 alpha-2 but the zone.tab entries are links to ...

  9. Spacetime diagram - Wikipedia

    en.wikipedia.org/wiki/Spacetime_diagram

    A spacetime diagram is a graphical illustration of locations in space at various times, especially in the special theory of relativity. Spacetime diagrams can show the geometry underlying phenomena like time dilation and length contraction without mathematical equations. The history of an object's location through time traces out a line or ...