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A short note on the history of physics
A short note on the history of physics
A short note on the history of physics
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According to this image, the bunch of spheres in the first formation occupies (Square root of 2) times that of the second formation. It is interesting the fact that if a sack was filled with spheres arranged as in the first figure, it would feel loose, but a sack filled with spheres in the form of the second figure would feel rigid.
Finally, Reynolds also made discoveries in the realm of ‘pure physics’. He showed that group velocities give the rate energy transmission by the wave (Gillespie, 1972, p.427). Moreover, his broadest piece of experimental work comes from an identification of the mechanical equivalent of heat. Regarding this subject, he accurately measured the heat required to raise a pound of water from the freezing to the boiling point (Lamb, 2004).
Moreover, Osborne Reynolds is well known for his papers about how a flat plate moving through a body produces a train of vortices behind it. Reynolds describes methods for depicting the internal motions of a fluid using colour bands (as he did when explaining laminar and turbulent flow). He tried to emphasize the vortex motion. Reynolds observed that vortex lines were formed behind an oblique wave, vortex rings were formed behind an inclined disc and vortex rings where caused due to drops falling into water (J.D. Jackson, 1995, p. 60).
Other important work
Osborne Reynolds is well known for his work in fluid mechanics and hydrodynamics; however, he contributed to other fields such as lubrication, bed formation, centrifugal pumps and turbines, and dilactancy.
Reynolds realized that maintaining a film of oil between a shaft and its bearing (causing a rise of pressure enough to support the shaft), could rely in the fact that the center of the shaft shifted away from the be...
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...tical velocity (marching rate), and liquid (troops). Thus, according to Reynolds, the greater the viscosity the greater the critical velocity of the liquid; furthermore, the greater the density of the liquid, the more likely the breakdown of motion (Gillespie, 1972, p.428).
Works Cited
Jackson, J.D. Proceedings: Mathematical and Physical Science, Vol. 451, No. 1941, Osborne Reynolds Centenary Volume (Oct. 9, 1995), pp. 49-86.
E S Gillespie. Physics Education, Vol.7, Issue 7, Osborne Reynolds (09, 1972), pp.427-428.
Lamb, Horace; Kargon, Robert H. ‘Reynolds, Osborne (1842-1912)’, Oxford Dictionary of National Biography, Oxford University Press, 2004.
Allen, Jack; McDowell, Donald Malcolm; Jackson, J.D. Osborne Reynolds and Engineering Science Today. Papers presented at the Osborne Reynolds Centenary Symposium, University of Manchester, September 1968, (1970)