What is Electricity?D. Appleton and Company, 1903 - 315 pagini |
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Pagina 9
... give in a pop- ular manner the present views of scientific men in re- gard to this question . According to modern ideas , the continuance of all life on the earth is due to the elec- trical energy which we receive from the sun ; and ...
... give in a pop- ular manner the present views of scientific men in re- gard to this question . According to modern ideas , the continuance of all life on the earth is due to the elec- trical energy which we receive from the sun ; and ...
Pagina 11
... gives us no vantage ground over the meta- physicians . Agnosticism in physical science is a hopeful creed when it is ... give in a popular man- ner the speculations of physicists upon the question , " What is electricity ? " we must ...
... gives us no vantage ground over the meta- physicians . Agnosticism in physical science is a hopeful creed when it is ... give in a popular man- ner the speculations of physicists upon the question , " What is electricity ? " we must ...
Pagina 11
... gives the mind something distinct to lay hold of , which , if you don't , Nature at once tells you you are wrong . Now , every stage of this conquest of truth leaves a more or less presentable trace on the memory , so that materials are ...
... gives the mind something distinct to lay hold of , which , if you don't , Nature at once tells you you are wrong . Now , every stage of this conquest of truth leaves a more or less presentable trace on the memory , so that materials are ...
Pagina 11
... gives out again electro - magnetic waves , of which we can only detect the light and heat manifestations . The Rumford professorship in Harvard University was endowed by Count Rumford in order to promote our knowledge of light and heat ...
... gives out again electro - magnetic waves , of which we can only detect the light and heat manifestations . The Rumford professorship in Harvard University was endowed by Count Rumford in order to promote our knowledge of light and heat ...
Pagina 17
... gives the enormous quantity of 6,332,000,000,000 tons . Let us take as a unit of handy measurement the weight of one of the lakes , say Ontario - 636 cubic miles . A cubic mile of water weighs 4,500,000,000 tons . Hence , Ontario weighs ...
... gives the enormous quantity of 6,332,000,000,000 tons . Let us take as a unit of handy measurement the weight of one of the lakes , say Ontario - 636 cubic miles . A cubic mile of water weighs 4,500,000,000 tons . Hence , Ontario weighs ...
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Termeni și expresii frecvente
action alternating current apparatus attraction bodies 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 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 tric tricity tube velocity vibrations voltaic cell zinc
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Pagina 262 - 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...
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Pagina 199 - Electrical matter differs from common matter in this, that the parts of the latter mutually attract, those of the former mutually repel each other.