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  2. Length contraction - Wikipedia

    en.wikipedia.org/wiki/Length_contraction

    Length contraction is the phenomenon that a moving object's length is measured to be shorter than its proper length, which is the length as measured in the object's own rest frame. [1] It is also known as Lorentz contraction or Lorentz–FitzGerald contraction (after Hendrik Lorentz and George Francis FitzGerald ) and is usually only noticeable ...

  3. Lorentz ether theory - Wikipedia

    en.wikipedia.org/wiki/Lorentz_ether_theory

    The so-called Length contraction without expansion perpendicularly to the line of motion and by the precise value = / (where l 0 is the length at rest in the aether) was given by Larmor in 1897 and by Lorentz in 1904. In the same year, Lorentz also argued that electrons themselves are also affected by this contraction.

  4. List of unsolved problems in economics - Wikipedia

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

    "Thirteen critical points in contemporary economic theory". Journal of Economic Literature. 10 (4): 1163– 1189. JSTOR 2721542. Alessandro Innocenti (1995). "Oskar Morgenstern and the Heterodox Potentialities of the Application of Game Theory to Economics". Journal of the History of Economic Thought. 17 (2): 205– 227. doi:10.1017 ...

  5. Experimental testing of time dilation - Wikipedia

    en.wikipedia.org/wiki/Experimental_testing_of...

    Time dilation and length contraction. Length of the atmosphere: The contraction formula is given by = /, where L 0 is the proper length of the atmosphere and L its contracted length. As the atmosphere is at rest in S, we have γ=1 and its proper Length L 0 is measured. As it is in motion in S′, we have γ>1 and its contracted length L′ is ...

  6. Economics: Principles, Problems, and Policies - Wikipedia

    en.wikipedia.org/wiki/Economics:_Principles...

    The first edition of the book was published in 1960. Until the 10th edition, the author was Campbell R. McConnell, professor of economics at the University of Nebraska, Lincoln, and since the 11th edition, which was published in 1990, Stanley L. Brue, a professor of economics, has become a co-author. [1]

  7. Bell's spaceship paradox - Wikipedia

    en.wikipedia.org/wiki/Bell's_spaceship_paradox

    They also argued that there indeed is a difference between a) and b): Case a) is the ordinary case of length contraction, based on the concept of the rod's rest length l 0 in S 0, which always stays the same as long as the rod can be seen as rigid. Under those circumstances, the rod is contracted in S.

  8. Hemline index - Wikipedia

    en.wikipedia.org/wiki/Hemline_index

    The hemline index is a theory that suggests that skirt length (hemlines) rise or fall along with stock prices. The most common version of the theory is that skirt lengths get shorter in good economic times (1920s, 1960s) [1] and longer in bad, such as after the 1929 Wall Street crash. However, the reverse has also been proposed with longer ...

  9. Problems with economic models - Wikipedia

    en.wikipedia.org/wiki/Problems_with_economic_models

    Most economic models rest on a number of assumptions that are not entirely realistic. For example, agents are often assumed to have perfect information, and markets are often assumed to clear without friction. Or, the model may omit issues that are important to the question being considered, such as externalities. Any analysis of the results of ...