Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
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Página 870
... given to any sound which seems unsuited to the requirements of music . This unfitness may arise from one or the other of two causes . Either , 1. The sound may be unpleasant from containing discordant ele- ments which jar with one ...
... given to any sound which seems unsuited to the requirements of music . This unfitness may arise from one or the other of two causes . Either , 1. The sound may be unpleasant from containing discordant ele- ments which jar with one ...
Página 881
... given by the formula 332 √1 + at in metres per second , or 1090 √1 + at in feet per second . The actual velocity of sound from place to place on the earth's sur- face is found by compounding this velocity with the velocity of the wind ...
... given by the formula 332 √1 + at in metres per second , or 1090 √1 + at in feet per second . The actual velocity of sound from place to place on the earth's sur- face is found by compounding this velocity with the velocity of the wind ...
Página 882
... given density , if P , denote the pressure at 0 ° , and a the co- efficient of expansion of air , the pressure at t ° Centigrade is Po ( 1 + at ) , the value of a being about 273 ' 1 Hence , if the velocity at 0 ° be 1090 feet per ...
... given density , if P , denote the pressure at 0 ° , and a the co- efficient of expansion of air , the pressure at t ° Centigrade is Po ( 1 + at ) , the value of a being about 273 ' 1 Hence , if the velocity at 0 ° be 1090 feet per ...
Página 883
... given by Newton in the Principia ( book 2 , section 8 ) . It proceeds on the tacit assumption that no changes of temperature are produced by the compressions and extensions which enter into the constitution . of a sonorous undulation ...
... given by Newton in the Principia ( book 2 , section 8 ) . It proceeds on the tacit assumption that no changes of temperature are produced by the compressions and extensions which enter into the constitution . of a sonorous undulation ...
Página 889
... given of its action is , that the slightly conical form of the long tube produces a series of reflections in directions more and more nearly parallel to the axis ; but this explana- tion fails to account for the utility of the bell ...
... given of its action is , that the slightly conical form of the long tube produces a series of reflections in directions more and more nearly parallel to the axis ; but this explana- tion fails to account for the utility of the bell ...
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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