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Frictional   Listen
Frictional

adjective
1.
Pertaining to or worked or produced by friction.  "Frictional heat" , "Frictional gearing"





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"Frictional" Quotes from Famous Books



... 236. Static or Frictional Electricity. There are many interesting and instructive experiments in this branch of electricity. All that can be done here is to explain a few pieces of simple apparatus to show the presence of static electricity, ...
— How Two Boys Made Their Own Electrical Apparatus • Thomas M. (Thomas Matthew) St. John
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... to be practically instantaneous. (Cf. "Modern Views of Electricity," Sec. 126, end of chap. xii.) Again, anything like a retarding effect of the medium through which the planets move would constitute a tangential force, entirely un-directed towards the sun. Hence no such frictional or retarding force can appreciably exist. It is, however, conceivable that both these effects might occur and just neutralize each other. The neutralization is unlikely to be exact for all the planets; and the fact is, that no trace ...
— Pioneers of Science • Oliver Lodge
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... several forms of the electric telegraph; first, that in which frictional electricity has been proposed to produce sparks and motion of ...
— Little Masterpieces of Science: - Invention and Discovery • Various
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... a machine for exciting the electric power in larger quantities by simply turning a ball of sulphur between the bare hands. Improved by Sir Isaac Newton and others, who employed glass rubbed with silk, it created sparks several inches long. The ordinary frictional machine as now made is illustrated in figure i, where P is a disc of plate glass mounted on a spindle and turned by hand. Rubbers of silk R, smeared with an amalgam of mercury and tin, to increase their efficiency, press the rim of the plate between them as it revolves, and a brass conductor ...
— The Story Of Electricity • John Munro
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... the algebras, in the diagram of which a pile of three shells, resting on the base, has been omitted. It is then seen that unless the pressures at an angle of 60 deg. with the horizontal are sufficient to produce frictional resistance of a very large amount, the balls will roll and instantly break the arch action suggested by the author. Consequently, an almost infinitesimal settlement of the "centering" may cause the complete destruction of ...
— Pressure, Resistance, and Stability of Earth • J. C. Meem
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