What is Electricity?D. Appleton & Company, 1896 - 315 pagini |
Din interiorul cărții
Rezultatele 1 - 5 din 54
Pagina 7
... placed upon a warm table and is afterward surrounded with hot - water bags or similar contrivances to supply heat . This external heat facili- tates the various transformations of energy which are going on in the human organism , and ...
... placed upon a warm table and is afterward surrounded with hot - water bags or similar contrivances to supply heat . This external heat facili- tates the various transformations of energy which are going on in the human organism , and ...
Pagina 14
... placed , B which had to be allowed for in the discussion of the results . One of the details of Prof. Poynting's in- vestigation illustrates a refinement of modern science due to Lord Kelvin . Since the attracting force is so small , it ...
... placed , B which had to be allowed for in the discussion of the results . One of the details of Prof. Poynting's in- vestigation illustrates a refinement of modern science due to Lord Kelvin . Since the attracting force is so small , it ...
Pagina 15
... placed at a distance . The movement of the mirror , it is evi- dent , sweeps a beam of light through space . A move- ment of of an inch could thus be detected in the motion of the attracting masses . An idea of the amount of the ...
... placed at a distance . The movement of the mirror , it is evi- dent , sweeps a beam of light through space . A move- ment of of an inch could thus be detected in the motion of the attracting masses . An idea of the amount of the ...
Pagina 32
... placed in a line with the magnetic pole of the earth , it immediately acquires the property of a magnet , its magnetic fluid being drawn or forced from one extremity to the other ; and this effect con- tinues as long as it remains in ...
... placed in a line with the magnetic pole of the earth , it immediately acquires the property of a magnet , its magnetic fluid being drawn or forced from one extremity to the other ; and this effect con- tinues as long as it remains in ...
Pagina 38
... placed in a vessel containing a salt of iron would be less than in air . It is to such considerations of the nature of the sur- rounding medium that we owe the advances in our knowledge of magnetism . Previous to the year 1800 , I have ...
... placed in a vessel containing a salt of iron would be less than in air . It is to such considerations of the nature of the sur- rounding medium that we owe the advances in our knowledge of magnetism . Previous to the year 1800 , I have ...
Alte ediții - Afișează-le pe toate
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
Pasaje populare
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.