General Physics: An Elementary Text-book for CollegesMacmillan, 1916 - 617 pagine |
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Parole e frasi comuni
acceleration amount amperes angle angular axis body Boyle's Law C.G.S. units called cell center of mass centimeters charge circuit coil conductor constant copper Defining equation definition denote density diamagnetic direction displacement distance dynes earth electric current electromotive force electrons electroscope equal equilibrium exerts experiment fact flame friction galvanometer gases glass gravity heat Hence indicated in Fig iron Joule Joule's Law Kundt's tube lens Leyden jar light linear lines of force liquid magnetic field mass measured melting mercury mirror needle negative observed Ohm's Law ohms particle pass pendulum piston placed plane plate pole position pressure produced pump quantity radius ratio reflected refraction resistance rotation shown in Fig sound speed sphere string substance surface t₁ temperature thermometer tion torque train of waves tube vector velocity vessel vibrations Voltaic cell volume wave length weight wire
Brani popolari
Pagina 343 - It is impossible for a selfacting machine, unaided by any external agency to convey heat from one body to another at a higher temperature, or heat cannot of itself pass from a colder to a warmer body.
Pagina 446 - As a unit of electromotive force, the international volt, which is the electromotive force that, steadily applied to a conductor whose resistance is one international ohm, will produce a current of one international ampere...
Pagina 301 - Is not the heat of the warm room conveyed through the vacuum by the vibrations of a much subtiler medium than air, which, after the air was drawn out, remained in the vacuum?
Pagina 403 - ... be rushing up everywhere — and then fall as positively charged rain, because of the processes just explained. The negative electrons, in the meantime, are carried up into the higher portions of the cumulus, where they unite with the cloud particles and thereby facilitate their coalescence into negatively charged drops. Hence the heavy rain...
Pagina 82 - 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.
Pagina 278 - Temperature. — The temperature of a body is its thermal state considered with reference to its power of communicating heat to other bodies.
Pagina 161 - The pressure is the same at all points in a horizontal plane of a liquid at rest under gravity.
Pagina 301 - Is not the Heat of the warm Room conveyed through the Vacuum by the Vibrations of a much subtiler Medium than Air, which after the Air was drawn out remained in the Vacuum...
Pagina 301 - If in two large tall cylindrical Vessels of Glass inverted, two little Thermometers be suspended so as not to touch the Vessels, and the Air be drawn out of one of these Vessels, and these Vessels thus prepared be carried out of a cold place into a warm one ; the Thermometer in vacua will grow warm -as much and almost as soon as the Thermometer which is not in vacua.
Pagina 302 - Medium exceedingly more rare and subtile than the Air, and exceedingly more elastick and active? And doth it not readily pervade all Bodies? And is it not (by its elastick force) expanded through all the Heavens?