An Elementary Handbook of PhysicsBlackwood, 1871 - 389 páginas |
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Página 20
... resistance of the air . Suppose the globular space marked ( 1 ) -fig . 17 - to be occupied by the contents of the balloon after the explo- sion , then the radius of this sphere ( the sphere being represented in the diagram by a circle ) ...
... resistance of the air . Suppose the globular space marked ( 1 ) -fig . 17 - to be occupied by the contents of the balloon after the explo- sion , then the radius of this sphere ( the sphere being represented in the diagram by a circle ) ...
Página 29
... resistance of this air is so slight that I am not conscious of it . The same muscular exertion will not enable me to walk the same distance through water , because the resistance is so much greater ; and a still less distance would it ...
... resistance of this air is so slight that I am not conscious of it . The same muscular exertion will not enable me to walk the same distance through water , because the resistance is so much greater ; and a still less distance would it ...
Página 36
... resistance of the air , which acts in opposition to the motion of any object in it . I move the prong of the fork from A to B. To do this I must use force enough to overcome the resistance of the particles of the fork , and also to push ...
... resistance of the air , which acts in opposition to the motion of any object in it . I move the prong of the fork from A to B. To do this I must use force enough to overcome the resistance of the particles of the fork , and also to push ...
Página 65
... resistance to compression of the air in the other bulb . No change of temperature in the room has any effect , because it affects both bulbs alike . If I apply the same amount of heat to each bulb , I confer on each an expansive force ...
... resistance to compression of the air in the other bulb . No change of temperature in the room has any effect , because it affects both bulbs alike . If I apply the same amount of heat to each bulb , I confer on each an expansive force ...
Página 105
... resistance offered to the passage of the current . Therefore we may fairly say , that not only is light developed from heat , but that both may be developed from electricity . I have elsewhere spoken of the physical forces as being natu ...
... resistance offered to the passage of the current . Therefore we may fairly say , that not only is light developed from heat , but that both may be developed from electricity . I have elsewhere spoken of the physical forces as being natu ...
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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.