Of mechanics and astronomyJ. Grigg, T. Desilver, E. Littel, Towar & Hogan, and Kimber & Sharpless, 1829 |
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Página 31
... velocity . Emma . What do you mean , papa , by velo- city ? Father . I will explain it by an example or two ; if you and Charles set out together , and you walk a mile in half an hour , but he walk and run two miles in the same time ...
... velocity . Emma . What do you mean , papa , by velo- city ? Father . I will explain it by an example or two ; if you and Charles set out together , and you walk a mile in half an hour , but he walk and run two miles in the same time ...
Página 32
... velocity , yet if the air be taken away , which is easily done , by a little apparatus connected with the air- pump , they will descend in the same time . Therefore the true reason why light and heavy bodies do not fall with equal ...
... velocity , yet if the air be taken away , which is easily done , by a little apparatus connected with the air- pump , they will descend in the same time . Therefore the true reason why light and heavy bodies do not fall with equal ...
Página 33
... velocity of moving bodies , you will easily comprehend what is meant by the word momentum . You The momentum , or moving force of a body , is its weight multiplied into its velocity . may , for instance , place this pound weight upon a ...
... velocity of moving bodies , you will easily comprehend what is meant by the word momentum . You The momentum , or moving force of a body , is its weight multiplied into its velocity . may , for instance , place this pound weight upon a ...
Página 34
... velocity . Charles . Then the momentum of a small body whose velocity is very great , may be equal to that of a very large body with a slow velocity . Father . It may , and hence you see the reason why immense battering rams , used by ...
... velocity . Charles . Then the momentum of a small body whose velocity is very great , may be equal to that of a very large body with a slow velocity . Father . It may , and hence you see the reason why immense battering rams , used by ...
Página 36
... velocity as they If the bodies were equal , they would meet in the middle point between the two ; but if they were unequal , they would then meet as much nearer the larger one , as that contained a greater quantity of matter than the ...
... velocity as they If the bodies were equal , they would meet in the middle point between the two ; but if they were unequal , they would then meet as much nearer the larger one , as that contained a greater quantity of matter than the ...
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Termos e frases comuns
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
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Página 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.
Página 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.
Página 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.
Página 109 - Of thirty years, to Mercury, whose disk Can scarce be caught by philosophic eye, Lost in the near effulgence of thy blaze.
Página 109 - One sun by day, by night ten thousand shine ; And light us deep into the DEITY.
Página 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.
Página 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.
Página 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.
Página 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.
Página 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...