An Elementary Handbook of PhysicsBlackwood, 1871 - 389 páginas |
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Página 133
... negative , fig . 71 . Electricity can be generated , as we have seen , by the friction of a stick of wax or of a glass rod . To con- vey it from the glass or wax to the electroscope ( as the gold - leaves enclosed in a glass with ...
... negative , fig . 71 . Electricity can be generated , as we have seen , by the friction of a stick of wax or of a glass rod . To con- vey it from the glass or wax to the electroscope ( as the gold - leaves enclosed in a glass with ...
Página 134
... negative , repel each other . If when they are apart I apply an excited glass rod , the leaves close , because the vitre- ous or positive electricity counteracts the negative and restores equilibrium . But it is nearly impossible that ...
... negative , repel each other . If when they are apart I apply an excited glass rod , the leaves close , because the vitre- ous or positive electricity counteracts the negative and restores equilibrium . But it is nearly impossible that ...
Página 135
... negative . Vitreous , or positive , attracts negative , or resinous , electricity , but repels its own kind . The same is true of negative electric- ity - i.e . , each kind attracts the other . If the two - fluid theory be correct ...
... negative . Vitreous , or positive , attracts negative , or resinous , electricity , but repels its own kind . The same is true of negative electric- ity - i.e . , each kind attracts the other . If the two - fluid theory be correct ...
Página 136
... negative - i . e . , containing less than its proper share , or neutral - i.e . , containing its normal amount . The negative body becomes more nearly neutral , the neutral body be- comes positive , because each receives electricity ...
... negative - i . e . , containing less than its proper share , or neutral - i.e . , containing its normal amount . The negative body becomes more nearly neutral , the neutral body be- comes positive , because each receives electricity ...
Página 138
... negative . I rub a piece of vulcanite or shellac with flannel : the vulcanite is negative , the flannel positive . The glass and vulcanite are non - conductors ; but it is quite possible to develop electric force by the friction of ...
... negative . I rub a piece of vulcanite or shellac with flannel : the vulcanite is negative , the flannel positive . The glass and vulcanite are non - conductors ; but it is quite possible to develop electric force by the friction of ...
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absorbed acid action amount of heat angle antimony apparatus arrangement atoms attraction ball battery becomes bismuth body carbon chemical coil colour conducting conductor connection continuous copper current passes decomposed decreases density direction distance earth effect electric current electric force electrified electroscope equal ether excited galvanic galvanometer gases given glass greater hydrogen inches increase latent heat length less Leyden jar light falling light passing liquid magnet magnetised means measure medium mercury metal mirror motion move needle negative nitric acid number of vibrations ordinary oxygen parallel particles passage piece plate platinum polarised pole position prism produce quantity radiation ray of light refraction repulsion result side soft iron solid sound sound-wave spark specific heat spectrum string substance sulphuric acid surface temperature theory thickness tion tricity tube velocity velocity of sound weight whole wire zinc
Passagens conhecidas
Página 54 - ... the angle of reflection is always equal to the angle of incidence, the image for any point can be seen only in the reflected ray prolonged.
Página 391 - A Manual of Palaeontology, for the Use of Students. With a General Introduction on the Principles of Palaeontology.
Página 292 - ... before incidence. Hence the reflected rays, on being produced back, will meet at a point as far behind the reflector as the point of the object is in front of it.