What is Electricity?D. Appleton and Company, 1903 - 315 страници |
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Страница 11
John Trowbridge. I have said that steam is at present our cheapest source of electricity . With the best engines it requires little more than a pound of coal to produce a horse power . This is a cheaper horse power than we can produce by ...
John Trowbridge. I have said that steam is at present our cheapest source of electricity . With the best engines it requires little more than a pound of coal to produce a horse power . This is a cheaper horse power than we can produce by ...
Страница 17
... horse power . The work done by Nature , therefore , in raising the rainfall to the clouds is equivalent to 100 , - 000 19,200 horse power , or 1,920,000,000 continu- ous horse power , or the work of 5,000,000,000 horses working ten ...
... horse power . The work done by Nature , therefore , in raising the rainfall to the clouds is equivalent to 100 , - 000 19,200 horse power , or 1,920,000,000 continu- ous horse power , or the work of 5,000,000,000 horses working ten ...
Страница 46
... horse power is stopped ; it is incapable of passing through the insulating substance of the paper . Here we are brought to a realizing sense of one of the chief pecul- iarities of the method of transmitting power by elec- tricity . No ...
... horse power is stopped ; it is incapable of passing through the insulating substance of the paper . Here we are brought to a realizing sense of one of the chief pecul- iarities of the method of transmitting power by elec- tricity . No ...
Страница 47
... horse power without experiencing the slightest sensation , and birds can sit on such a wire with the safety that they can rest on a dead limb of a tree . When the wire is broken , however , there is a blinding flash of light and a loud ...
... horse power without experiencing the slightest sensation , and birds can sit on such a wire with the safety that they can rest on a dead limb of a tree . When the wire is broken , however , there is a blinding flash of light and a loud ...
Страница 48
... power . The pressure of compressed air or steam is not sensibly affected by a rapid motion of the pipe contain- ing it ; for instance , we could quickly revolve a hollow ring like a top about a ... horse power , 48 WHAT IS ELECTRICITY ?
... power . The pressure of compressed air or steam is not sensibly affected by a rapid motion of the pipe contain- ing it ; for instance , we could quickly revolve a hollow ring like a top about a ... horse power , 48 WHAT IS ELECTRICITY ?
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Често срещани думи и фрази
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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Страница 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.