Of mechanics and astronomyJ. Grigg, T. Desilver, E. Littel, Towar & Hogan, and Kimber & Sharpless, 1829 |
מתוך הספר
תוצאות 1-5 מתוך 21
עמוד 41
... acting , so the velocity of falling bo- dies is an increasing , or , as it is usually called , an accelerating velocity . It is found by very accurate experiments , that a body , descending from a considerable height by the force of gra ...
... acting , so the velocity of falling bo- dies is an increasing , or , as it is usually called , an accelerating velocity . It is found by very accurate experiments , that a body , descending from a considerable height by the force of gra ...
עמוד 59
... by an external force , acting upon it in some way or other . I have seen a gentleman , when skating on very slippe- ry ice , go a great way without any exertion to himself , but where the ice was rough , he LAWS OF MOTION . 5.9.
... by an external force , acting upon it in some way or other . I have seen a gentleman , when skating on very slippe- ry ice , go a great way without any exertion to himself , but where the ice was rough , he LAWS OF MOTION . 5.9.
עמוד 64
... be the consequence , supposing the projectile force to cease ? Father . The moon must fall to the earth ; and if the force of gravity were to cease acting upon the moon , it would fly off into infinite space 64 MECHANICS .
... be the consequence , supposing the projectile force to cease ? Father . The moon must fall to the earth ; and if the force of gravity were to cease acting upon the moon , it would fly off into infinite space 64 MECHANICS .
עמוד 68
... acting conjointly in this way , are not so great as when they act separately . Father . That is true , and you are led to the conclusion , I suppose , from the recollection ,. that in every triangle any two sides taken to- gether are ...
... acting conjointly in this way , are not so great as when they act separately . Father . That is true , and you are led to the conclusion , I suppose , from the recollection ,. that in every triangle any two sides taken to- gether are ...
עמוד 69
... acting upon it for the same time . If A B and A c acted as single impulses , the moon would in that case describe the diagonal A D ; but since these forces are constantly act- ing , and that of gravity is an accelerating force also ...
... acting upon it for the same time . If A B and A c acted as single impulses , the moon would in that case describe the diagonal A D ; but since these forces are constantly act- ing , and that of gravity is an accelerating force also ...
מהדורות אחרות - הצג הכל
מונחים וביטויים נפוצים
24 hours angle annual motion appear Aries astronomers attraction of cohesion axis body called Capricorn centre of gravity centre of motion Charles clock consequently CONVERSATION darkness days and nights degrees diameter distance diurnal motion earth earth's orbit eclipse Emma enlightened equal equator explain fall Father feet figure fixed stars force fulcrum full moon globe greater half harvest moon heat heavens hemisphere hence Herschel horizon inch inclined plane inhabitants James Julius Cæsar larger Leap-Year length less lever Libra light matter mechanical power Mercury millions of miles minutes moon's move nearer observe parallel perpendicular planets Plate VII polar circles poles pound pulleys rays revolves rise rotation round the sun satellite Saturn seasons seen shadow shine sidereal day solar summer sun and earth sun's supposed surface synodical month tance tides tion tropic tropic of Cancer tropic of Capricorn turn Tutor velocity Venus vertical visible weight winter
קטעים בולטים
עמוד 177 - Amid the radiant orbs, That more than deck — that animate — the sky, The life-infusing suns of other worlds ; Lo ! from the dread immensity of space Returning, with accelerated course, The rushing comet to the Sun descends ; And as he sinks below the shading earth, With awful train projected o'er the heavens, 1710 The guilty nations tremble.
עמוד 161 - On earth join all ye creatures to extol Him first, him last, him midst, and without end. Fairest of stars, last in the train of night, If better thou belong not to the dawn, Sure pledge of day, that crown'st the smiling morn With thy bright circlet, praise him in thy sphere, While day arises, that sweet hour of prime.
עמוד 144 - Less than archangel ruined, and the excess Of glory obscured ; as when the sun, new risen, Looks through the horizontal misty air Shorn of his beams, or from behind the moon, In dim eclipse, disastrous twilight sheds On half the nations, and with fear of change Perplexes monarchs.
עמוד 109 - Of thirty years, to Mercury, whose disk Can scarce be caught by philosophic eye, Lost in the near effulgence of thy blaze.
עמוד 109 - One sun by day, by night ten thousand shine ; And light us deep into the DEITY.
עמוד 126 - evidence of things not seen," in the fulness of Divine grace ; and was profound on this, the greatest concern of human life, while unable even to comprehend how the " inclination of the earth's axis to the plane of its orbit" could be the cause of the change of the seasons.
עמוד 41 - These are usually accounted six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw.
עמוד 86 - To ask or search I blame thee not, for heaven Is as the book of God before thee set, Wherein to read his wondrous works, and learn His seasons, hours, or days, or months, or years.
עמוד 28 - If the force with which it strikes the air below it, is equal to the weight of its body, then the re-action of the air upwards is likewise equal to it, and the bird being acted upon by two equal forces in contrary directions, will rest between them. If the force of the stroke is greater than its weight, the bird will rise with the difference of these two forces ; and if the stroke be less than its weight, then it will sink with the difference.
עמוד 134 - But opposite in levell'd west was set His mirror, with full face borrowing her light From him, for other light she needed none In that aspect, and still that distance keeps Till night...