Lessons in elementary physics1884 |
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Side 133
... intensity . This something is analogous to quality , and is called the timbre of the note . Indeed no note is ever entirely pure , and the timbre has been found by Helmholtz to depend upon the number and intensity of the various tones ...
... intensity . This something is analogous to quality , and is called the timbre of the note . Indeed no note is ever entirely pure , and the timbre has been found by Helmholtz to depend upon the number and intensity of the various tones ...
Side 140
... intensity of Sound . — When the air is disturbed so as to cause a sound , this disturbance spreads out on all sides ... intensity , will be four times less . Thus by doubling the distance from the centre of disturbance , we diminish the ...
... intensity of Sound . — When the air is disturbed so as to cause a sound , this disturbance spreads out on all sides ... intensity , will be four times less . Thus by doubling the distance from the centre of disturbance , we diminish the ...
Side 142
... intensity of the sound of a musical string is strengthened by a sounding - box . - This is a hollow box , which along with its air vibrates in unison with the string . By an arrangement of this kind , the sound that would other- wise ...
... intensity of the sound of a musical string is strengthened by a sounding - box . - This is a hollow box , which along with its air vibrates in unison with the string . By an arrangement of this kind , the sound that would other- wise ...
Side 229
... intensity of the illumination of a plate or screen is proportional to the cross section which it presents to the direction of radiation . Thus let Fig . 70 denote FIG . 7C . B A. 4 parallel rays from a far - off source falling upon a ...
... intensity of the illumination of a plate or screen is proportional to the cross section which it presents to the direction of radiation . Thus let Fig . 70 denote FIG . 7C . B A. 4 parallel rays from a far - off source falling upon a ...
Side 230
... intensity of light is measured by an instrument called a photometer ; one of the simplest of these is that devised by Bunsen , who makes a grease spot in a sheet of porous paper . This spot , if illuminated in front , will appear darker ...
... intensity of light is measured by an instrument called a photometer ; one of the simplest of these is that devised by Bunsen , who makes a grease spot in a sheet of porous paper . This spot , if illuminated in front , will appear darker ...
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Vanlige uttrykk og setninger
49 metres 98 metres action actual energy angle annealed applied atmosphere attraction ball beam carbonic acid carriage centre of gravity chemical affinity column compression cubic cubic centimetre cylinder denote density displacement distance double earth electricity energy of position equilibrium experiments fact fall fluid focus force of gravity force tending friction gases glass grammes hence increase instance kilogrammes latent heat law of motion length let us suppose liquid luminous mass means mercury metres per second miles mirror molecular momentum moving force oscillation particles pendulum piston plane plate pressure produce proportional ray of light represent resistance rest side solid sound space passed specific gravity specific heat square centimetre steam stone string substance temperature thermometer tube unit upwards vapour various velocity of 98 vertical vessel vibration visible energy visible motion volume wave wave-length weight whole zinc
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