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The strong interaction, or strong nuclear force, is the most complicated interaction, mainly because of the way it varies with distance. The nuclear force is powerfully attractive between nucleons at distances of about 1 femtometre (fm, or 10 −15 metres), but it rapidly decreases to insignificance at distances beyond about 2.5 fm. At ...
Kennedy argues that the strength of a Great Power can be properly measured only relative to other powers, and he provides a straightforward thesis: Great Power ascendancy (over the long term or in specific conflicts) correlates strongly to available resources and economic durability; military overstretch and a concomitant relative decline are the consistent threats facing powers whose ...
The economic history of the United States spans the colonial era through the 21st century. The initial settlements depended on agriculture and hunting/trapping, later adding international trade, manufacturing, and finally, services, to the point where agriculture represented less than 2% of GDP .
Hesiod active 750 to 650 BC, a Boeotian who wrote the earliest known work concerning the basic origins of economic thought, contemporary with Homer. [3] Of the 828 verses in his poem Works and Days, the first 383 centered on the fundamental economic problem of scarce resources for the pursuit of numerous and abundant human ends and desires.
Lanchester determined that the power of such a force is proportional not to the number of units it has, but to the square of the number of units. This is known as Lanchester's square law. More precisely, the law specifies the casualties a shooting force will inflict over a period of time, relative to those inflicted by the opposing force.
In physics, a unified field theory (UFT) is a type of field theory that allows all fundamental forces and elementary particles to be written in terms of a single type of field. According to modern discoveries in physics, forces are not transmitted directly between interacting objects but instead are described and interpreted by intermediary ...
The strong force overpowers the electrostatic repulsion of protons and quarks in nuclei and hadrons respectively, at their respective scales. While quarks are bound in hadrons by the fundamental strong interaction, which is mediated by gluons, nucleons are bound by an emergent phenomenon termed the residual strong force or nuclear force.
An Economic History of the World Since 1400 (2016) online 48 university lectures; Liss, Peggy K. Atlantic Empires: The Network of Trade and Revolution, 1713–1826 (Johns Hopkins University Press, 1983). Neal, Larry, and Rondo Cameron. A Concise Economic History of the World: From Paleolithic Times to the Present (5th ed. 2015) 3003 edition online