What is Electricity?D. Appleton & Company, 1896 - 315 pagini |
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Pagina 12
... attraction of gravitation . Our ultimate appeal , therefore , on the subject of the transformation of energy upon which we are entering is to gravitation , and it will be interesting at the opening stage of our study of electro ...
... attraction of gravitation . Our ultimate appeal , therefore , on the subject of the transformation of energy upon which we are entering is to gravitation , and it will be interesting at the opening stage of our study of electro ...
Pagina 13
... attraction between two small bodies , such as two cannon balls , is extremely difficult to detect and to measure . The direct determination of the attraction between two masses by means of the com- mon balance is the simplest way of ...
... attraction between two small bodies , such as two cannon balls , is extremely difficult to detect and to measure . The direct determination of the attraction between two masses by means of the com- mon balance is the simplest way of ...
Pagina 14
... attracted by a mass of 154 kilogrammes of lead , showed an apparent increase of about 0.01 milligramme . We perceive from this how small the force is which is to be measured , and in order to determine it with accuracy Prof. Poynting ...
... attracted by a mass of 154 kilogrammes of lead , showed an apparent increase of about 0.01 milligramme . We perceive from this how small the force is which is to be measured , and in order to determine it with accuracy Prof. Poynting ...
Pagina 15
... attraction between bodies of small magnitude requires for its detection apparatus of extreme delicacy , yet when one of the attracting bodies is large , like the earth , the force of attraction between it and even minute bodies becomes ...
... attraction between bodies of small magnitude requires for its detection apparatus of extreme delicacy , yet when one of the attracting bodies is large , like the earth , the force of attraction between it and even minute bodies becomes ...
Pagina 16
... attracted by gravitation and descends . In this way are formed what are called convection currents in water or in our atmosphere . The force of gravitation tends to equalize the movements produced by heat . In the case of an ascending ...
... attracted by gravitation and descends . In this way are formed what are called convection currents in water or in our atmosphere . The force of gravitation tends to equalize the movements produced by heat . In the case of an ascending ...
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Termeni și expresii frecvente
action alternating current apparatus attraction body carbon cathode rays centimetres charged circuit coil of wire conductor connected copper copper wire Crookes tube current of electricity detect direction discharge distance dynamo dynamo machine earth effect elec electric current electric spark electric waves electrical energy electrical machine electro-magnetic electro-magnetic waves electro-motive force employed ether excited experiments Faraday flow fluid galvanometer glass gravitation horse power Illustrations inch insulated iron J. J. Thomson lamp Leyden jar lines of force lines of magnetic magnetic force manifestations means measure medium metals method mirror molecular molecules motor movement needle obtained ordinary oscillations oxygen pass phenomena phenomenon photograph pipes placed plate polarization pressure produced Prof refraction resistance revolving Ruhmkorff coil self-induction south pole space spark gap spool steam engine storage battery suitable telephone terminals theory tion to-and-fro currents transformations of energy transmitted tricity tube velocity vibrations voltaic cell zinc
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Pagina 314 - SOUND : a Series of Simple, Entertaining, and Inexpensive Experiments in the Phenomena of Sound, for the use of Students of every age.
Pagina 296 - ... of our planet, so far as we know it; and nitrogen is very far the predominant constituent of our atmosphere. If the earth is a detached bit whirled off the mass of the sun, as cosmogonists love to tell us, how comes it that in leaving the sun we cleaned him out so completely of his nitrogen and oxygen that not a trace of these gases remains behind to be discovered even by the sensitive vision of the spectroscope...
Pagina 256 - In extending the researches relative to this part of the investigations, a remarkable result was obtained in regard to the distance at which inductive effects are produced by a very small quantity of electricity; a single spark from the prime conductor of the machine, of about an inch long, thrown on the end of a circuit of wire in an upper room, produced an induction sufficiently powerful to magnetize needles in a parallel circuit of wire...
Pagina 313 - Part I. MECHANICS, HYDROSTATICS, and PNEUMATICS. Part II. HEAT. Part III. ELECTRICITY and MAGNETISM. Part IV.
Pagina 118 - Faraday, in his mind's eye, saw lines of force traversing all space where the mathematicians saw centres of force attracting at a distance : Faraday saw a medium where they saw nothing but distance : Faraday sought the seat of the phenomena in real actions going on in the medium, they were satisfied that they had found it in a power of action at a distance impressed on the electric fluids.