An Elementary Handbook of PhysicsBlackwood, 1871 - 389 páginas |
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Página 13
... caused by the action of the fire . Still the body exposed to the fire becomes warm by means of the heat received from the fire . The action and the result is as if the fire emitted some agent ( of such ethereal nature as to be capable ...
... caused by the action of the fire . Still the body exposed to the fire becomes warm by means of the heat received from the fire . The action and the result is as if the fire emitted some agent ( of such ethereal nature as to be capable ...
Página 15
... cause . A cork , a piece of lead , and a feather , if let fall in a space en- tirely vacant - i.e . , an absolute ... causes . If we take a piece of lead , and another of cork , equal in size , and weigh them against each other , the ...
... cause . A cork , a piece of lead , and a feather , if let fall in a space en- tirely vacant - i.e . , an absolute ... causes . If we take a piece of lead , and another of cork , equal in size , and weigh them against each other , the ...
Página 17
... causes what we call a sound , is in actual contact with our ears . A bell is rung - i . e . , its clapper is set in motion and strikes the side of the bell . This vibrates and sets the air in motion ; this motion is communicated from ...
... causes what we call a sound , is in actual contact with our ears . A bell is rung - i . e . , its clapper is set in motion and strikes the side of the bell . This vibrates and sets the air in motion ; this motion is communicated from ...
Página 21
... cause , the force with which the compression is made . Thus , this alternate com- pression and expansion con- tinues ... caused the sound - wave . The greater this force , the greater the radius of the first , and of every succeeding ...
... cause , the force with which the compression is made . Thus , this alternate com- pression and expansion con- tinues ... caused the sound - wave . The greater this force , the greater the radius of the first , and of every succeeding ...
Página 23
... cause , the increase of initial force . ( 6. ) Nature of Sound . - To show that sound is this alternate compression and expansion of successive spherical shells of air ( supposing air to be the medium ) , and not a continual movement ...
... cause , the increase of initial force . ( 6. ) Nature of Sound . - To show that sound is this alternate compression and expansion of successive spherical shells of air ( supposing air to be the medium ) , and not a continual movement ...
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Palavras e frases frequentes
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.