منابع مشابه
Archimedes’ floating bodies on a spherical Earth
Archimedes was the first to systematically find the centers of gravity of various solid bodies and to apply this concept in determining stable configurations of floating bodies. In this paper, we discuss an error in a proof developed by Archimedes that involves determining whether a uniform, spherical cap will float stably with its base horizontal in a liquid on a spherical Earth. We present a ...
متن کاملCarbon nanotube Archimedes screws.
Recently, nanomechanical devices composed of a long stationary inner carbon nanotube and a shorter, slowly rotating outer tube have been fabricated. In this paper, we study the possibility of using such devices as nanoscale transducers of motion into electricity. When the outer tube is chiral, we show that such devices act like quantum Archimedes screws, which utilize mechanical energy to pump ...
متن کاملArchimedes’ Cattle Problem
If thou art diligent and wise, O stranger, compute the number of cattle of the Sun, who once upon a time grazed on the fields of the Thrinacian isle of Sicily, divided into four herds of different colours, one milk white, another glossy black, the third yellow and the last dappled. In each herd were bulls, mighty in number according to these proportions: Understand, stranger, that the white bul...
متن کاملComparative Statics On The Allocation Of Spectrum
Allocation of spectrum is an important policy issue and decisions taken have ramifications for future growth of wireless communications and achieving universal connectivity. In this paper, on a common footing we compare the social welfare obtained from the allocation of new spectrum under different alternatives: to licensed providers in monopolistic, oligopolistic and perfectly competitive sett...
متن کاملThe Archimedes Codex
We learned, of course, something of the curious story of the oldest (by 400 years) surviving manuscript of some of Arch imedes ’ works, collected in a Byzantine codex that contained the end of Equilibrium of Planes , great parts of The Sphere and the Cylinder and Measurement of the Circle, a sizable portion of On Floating Bodies, one folio of The Stomachion, and a large portion of The Method. T...
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ژورنال
عنوان ژورنال: THEORIA. An International Journal for Theory, History and Foundations of Science
سال: 2020
ISSN: 2171-679X,0495-4548
DOI: 10.1387/theoria.20482