Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
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Página 864
... equivalent is— 41.6 millions for the centimetre and Centigrade degree ; or 1 gramme - degree is equivalent to 41 6 million ergs . ACOUSTICS . CHAPTER LXII . PRODUCTION AND PROPAGATION OF SOUND X FRENCH AND ENGLISH MEASURES .
... equivalent is— 41.6 millions for the centimetre and Centigrade degree ; or 1 gramme - degree is equivalent to 41 6 million ergs . ACOUSTICS . CHAPTER LXII . PRODUCTION AND PROPAGATION OF SOUND X FRENCH AND ENGLISH MEASURES .
Página 865
... SOUND . 866. Sound is a Vibration . - Sound , as directly known to us by the sense of hearing , is an impression of a peculiar character , very broadly distinguished from the impressions received through the rest of our senses , and ...
... SOUND . 866. Sound is a Vibration . - Sound , as directly known to us by the sense of hearing , is an impression of a peculiar character , very broadly distinguished from the impressions received through the rest of our senses , and ...
Página 866
... its movements become more rapid , and at the same time VIBRATION OF A PLATE . 867 more limited , until. Fig . 593. - Vibration of Bell . Fig . 594. - Vibration of Plate . Fig . 866 PRODUCTION AND FROPAGATION OF SOUND .
... its movements become more rapid , and at the same time VIBRATION OF A PLATE . 867 more limited , until. Fig . 593. - Vibration of Bell . Fig . 594. - Vibration of Plate . Fig . 866 PRODUCTION AND FROPAGATION OF SOUND .
Página 867
... sound continues . By lightly touching the bell , we may feel that it is vibrating ; and if we press strongly , the vibration and the sound will both be stopped . Vibration of a Plate . - Sand is strewn over the surface of a hori- zontal ...
... sound continues . By lightly touching the bell , we may feel that it is vibrating ; and if we press strongly , the vibration and the sound will both be stopped . Vibration of a Plate . - Sand is strewn over the surface of a hori- zontal ...
Página 868
... sound , the sand dances , leaves certain parts bare , and collects in definite lines , which are called nodal lines . These are , in fact , the lines which separate portions of the plate whose movements are in oppo- site directions ...
... sound , the sand dances , leaves certain parts bare , and collects in definite lines , which are called nodal lines . These are , in fact , the lines which separate portions of the plate whose movements are in oppo- site directions ...
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Términos y frases comunes
achromatic analyser angle of incidence beam body bright lines called centimetres centre coincidence colours concave mirror conjugate foci convex convex lens crystal curvature denote diameter direction distance employed equal experiment eye-piece flame focal length frequency of vibration fundamental note glass harmonics Hence Iceland-spar incident ray index of refraction interval inverted law of sines lens lenses luminous point magnifying power medium metres minimum deviation nearly node normal number of vibrations object object-glass oblique observer obtained octave optical ordinary parallel particles pencil perpendicular pipe pitch placed plane mirror plate polarization portion position principal axis principal focus prism produced propagation radius rarefaction ratio reflected rays refrangibility represented retina rotation screen seen side slit solar spectra spectrum spherical string subtends surface telescope tion tone traversing tube undulation velocity of sound vertical vibrations vibrations per second violet virtual image visual angle wave-front wave-length waves