A Text Book of the Principles of Physics |
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Common terms and phrases
acceleration acting amount amplitude angular velocity atmospheric pressure atoms axis becomes body Boyle's law carbonic acid centre chemical decomposition coefficient component compound compression constant cord corresponding curve cylinder density direction disc displacement distance dynes effect elastic equal equation equipotential surfaces ergs Ether ether-waves expansion external flask flow fluid force frequency friction gases glass gramme gravity greater heat Hence hydrogen increased kinetic energy length light liquid mass matter measured membrane mercury molecular molecules motion move movement oscillation oxygen particles pass pendulum piston plane position potential energy produced propagation proportional quantity radius ratio reflexion refracted resistance resultant right angles rotation round solid solution sound space stream string substance surface temperature tension thermal capacity tion tone tube tuning-fork unit vapour varies velocity velocity of propagation vessel vibration viscosity volume wave wave-front wave-length weight whole wire
Popular passages
Page 6 - Change of motion is proportional to the impressed force and takes place in the direction of the straight line in which the force acts.
Page 6 - To every action there is always an equal and contrary reaction ; or the mutual actions of any two bodies are always equal and oppositely directed.
Page 235 - ... by a moving mass ; that it is not discontinuous or granular ; and hence, that, as a whole, it may be compared to an impalpable and all-pervading jelly, through which light and heat waves are constantly throbbing, which is constantly being set in local strains and released from them, and being whirled in local vortices, thus producing the various phenomena of electricity and magnetism ; and through which the particles of ordinary matter move freely, encountering but little retardation if any ;...
Page 783 - FREDERICK BEDELL, HOMER J. HOTCHKISS, CHARLES P. MATTHEWS, and THE EDITOR. Cloth, pp. 444. $3.25The first volume, intended for beginners, affords explicit directions adapted to a modern laboratory, together with demonstrations and elementary statements of principles. It is assumed that the student possesses some knowledge of analytical geometry and of the calculus. In the second volume more is left to the individual eflort and to the maturer intelligence of the practicant.
Page 577 - Electricity and magnetism are not forms of energy ; neither are they forms of matter. They may, perhaps, be provisionally defined as properties or conditions of matter ; but whether this matter be the ordinary matter, or whether it be, on the other hand, that all-pervading ether by which ordinary matter is everywhere surrounded, is a question which has been under discussion, and which may now be fairly held to be settled in favor of the latter view.— DANIELL : Principles of Physics [2d ed.], 532.