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In fluid dynamics, the entrance length is the distance a flow travels after entering a pipe before the flow becomes fully developed. [1] Entrance length refers to the length of the entry region, the area following the pipe entrance where effects originating from the interior wall of the pipe propagate into the flow as an expanding boundary layer.
In engineering, the Moody chart or Moody diagram (also Stanton diagram) is a graph in non-dimensional form that relates the Darcy–Weisbach friction factor f D, Reynolds number Re, and surface roughness for fully developed flow in a circular pipe. It can be used to predict pressure drop or flow rate down such a pipe.
Basic diagram of the circular flow of income. The functioning of the free-market economic system is represented with firms and households and interaction back and forth. [2] The circular flow of income or circular flow is a model of the economy in which the major exchanges are represented as flows of money, goods and services, etc. between ...
AP World History: Modern was designed to help students develop a greater understanding of the evolution of global processes and contacts as well as interactions between different human societies. The course advances understanding through a combination of selective factual knowledge and appropriate analytical skills.
Wallerstein developed the World Systems Theory utilizing the Dependence theory along with the ideas of Marx and the Annales School. [18] This theory postulates a third category of countries, the semi-periphery, intermediate between the core and periphery. Wallerstein believed in a tri-modal rather than a bi-modal system because he viewed the ...
The price–specie flow mechanism is a model developed by Scottish economist David Hume (1711–1776) to illustrate how trade imbalances can self-correct and adjust under the gold standard. Hume expounded his argument in Of the Balance of Trade , which he wrote to counter the Mercantilist idea that a nation should strive for a positive balance ...
There are many examples of countries that have converged with developed countries which validate the catch-up theory. [5] Based on case studies on Japan, Mexico and other countries, Nakaoka studied social capabilities for industrialization and clarified the features of human and social attitudes in the catching-up process of Japan in the Meiji period (1868-1912).
In economics, the Lucas paradox or the Lucas puzzle is the observation that capital does not flow from developed countries to developing countries despite the fact that developing countries have lower levels of capital per worker. [1]