An Elementary Handbook of PhysicsBlackwood, 1871 - 389 páginas |
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Página 19
... round , I hear nothing ; but as I increase the speed of the revolutions I also increase the sound , and it gradually becomes audible . By shortening the string , or by increasing the speed , I increase the number of vibrations in any ...
... round , I hear nothing ; but as I increase the speed of the revolutions I also increase the sound , and it gradually becomes audible . By shortening the string , or by increasing the speed , I increase the number of vibrations in any ...
Página 24
... round while being struck , the sound would pass to each man in turn . Just as if a lantern , having but a few holes in its sides , were turned round and round , when the light - rays would pass over each man in succes- sion , and each ...
... round while being struck , the sound would pass to each man in turn . Just as if a lantern , having but a few holes in its sides , were turned round and round , when the light - rays would pass over each man in succes- sion , and each ...
Página 35
... round the corner of a street is stopped by coming into contact with another man who is standing still . The force that he loses is transferred to the second man , who is more or less in danger of being thrown down , and has to exert ...
... round the corner of a street is stopped by coming into contact with another man who is standing still . The force that he loses is transferred to the second man , who is more or less in danger of being thrown down , and has to exert ...
Página 42
... round a screw ( as in a violin ) or by fasten- ing a weight to it . The string being thus tightened , I set it in vibration either by drawing a bow across it , or drawing it side- ways with the finger and releasing it suddenly . The ...
... round a screw ( as in a violin ) or by fasten- ing a weight to it . The string being thus tightened , I set it in vibration either by drawing a bow across it , or drawing it side- ways with the finger and releasing it suddenly . The ...
Página 89
... round it , as it were , unable to effect an entrance , and is almost all given off again as temperature . Gradually it finds its way within , the particles begin to be slightly loosened , and less of the applied heat acts on the ...
... round it , as it were , unable to effect an entrance , and is almost all given off again as temperature . Gradually it finds its way within , the particles begin to be slightly loosened , and less of the applied heat acts on the ...
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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.