Scientific Dialogues, Volume 1M. Carey, 1815 |
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Página 63
... travels six miles an hour , and another person travels twelve miles in the same time , the latter will go with double the velocity of the former : consequently the velocities of falling bodies increase as the squares of the times ...
... travels six miles an hour , and another person travels twelve miles in the same time , the latter will go with double the velocity of the former : consequently the velocities of falling bodies increase as the squares of the times ...
Página 101
... travels twelve times the space that is gone through by the hour - hand . Father . But this can be only true on the supposition , that the two circles are equal . In my watch , the minute - hand is longer than the other , and ...
... travels twelve times the space that is gone through by the hour - hand . Father . But this can be only true on the supposition , that the two circles are equal . In my watch , the minute - hand is longer than the other , and ...
Página 164
... for the present , give me credit when I tell you that the distance of the fix- ed stars from us is immensely great , conse- quently the rays of light have to travel this distance , in the course of which , especially in 164 ASTRONOMY .
... for the present , give me credit when I tell you that the distance of the fix- ed stars from us is immensely great , conse- quently the rays of light have to travel this distance , in the course of which , especially in 164 ASTRONOMY .
Página 200
... travels at the rate of 8 miles in one minute , and you will know how long any body issuing from the sun , with the ve- locity of a cannon - ball , would employ in reaching the earth . Charles . If I divide 95,000,000 by 525 , 600 ...
... travels at the rate of 8 miles in one minute , and you will know how long any body issuing from the sun , with the ve- locity of a cannon - ball , would employ in reaching the earth . Charles . If I divide 95,000,000 by 525 , 600 ...
Página 221
... travel pretty swiftly in a carriage by the side of a field ploughed into long narrow ridges , and perpendicular to the road , you will think that all the ridges are turning round in a direction contrary to that of the carriage . These ...
... travel pretty swiftly in a carriage by the side of a field ploughed into long narrow ridges , and perpendicular to the road , you will think that all the ridges are turning round in a direction contrary to that of the carriage . These ...
Palavras e frases frequentes
angle appear astronomers attraction of cohesion attraction of gravitation axis ball called centre of gravity centre of motion Charles clock consequently CONVERSATION days and nights degrees diameter distance diurnal motion earth eclipse Emma Ephemeris equal equator fall Father feet fixed stars force fulcrum full moon globe greater heat heavens hence Herschel horizon inch inclined plane James journey Jupiter kind law of motion length LENOX AND TILDEN lever light line of direction marble Mars matter means mechanical powers Mercury millions of miles minutes moon's move nearer observe orbit papa perpendicular planets Plate polar circles poles pound pound weight principle proportion PUBLIC LIBRARY ASTOR pulleys rays reason retrograde motion revolves rise rotation round the sun Saturn screw seen sidereal day solar space passed sun's superior planets supposed surface tides tion turn Tutor velocity Venus visible wedge weight YORK PUBLIC LIBRARY
Passagens conhecidas
Página 353 - From seeming evil still educing good, And better thence again, and better still, In infinite progression. But I lose Myself in Him, in light ineffable ! Come, then, expressive Silence, muse His praise.
Página 262 - 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 202 - Of thirty years, to Mercury, whose disk Can scarce be caught by philosophic eye, Lost in the near effulgence of thy blaze.
Página 201 - Prime cheerer, light! Of all material beings first, and best ! Efflux divine ! Nature's resplendent robe ! Without whose vesting beauty all were wrapt In unessential gloom ; and thou, O sun ! Soul of surrounding worlds, in whom best seen Shines out thy Maker...
Página 82 - There is no difficulty in this, for if while my cricket-ball is rolling along after Henry has struck it, I strike it again, it goes on with increased velocity, and that in proportion to the strength which I exert on the occasion ; whereas, if while it is rolling, I strike it back again, or give it a side blow, I change the direction of its course.
Página 288 - 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 277 - Were slunk, all but the wakeful nightingale ; She all night long her amorous descant sung ; Silence was pleased : now glow'd the firmament With living sapphires ; Hesperus that led The starry host rode brightest, till the moon, Rising in clouded majesty, at length Apparent queen unveil'd her peerless light, And o'er the dark her silver mantle threw.
Página 85 - 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 9 - ... of the terms which he is obliged to use. Ignorance of the language in which any science is taught, is an insuperable bar to its being suddenly acquired ; besides a precise knowledge of the meaning of terms, we must have an instantaneous idea excited in our minds whenever they are repeated ; and, as this can be acquired only by practice, it is impossible that philosophical lectures can be of much service to those who are not familiarly acquainted with the technical language in which they are delivered...
Página 205 - Mercury completes his transient year, Glowing, refulgent, with reflected glare; Bright Venus occupies a wider way, The early harbinger of night and day ; More distant still our globe terraqueous turns, Nor chills intense, nor fiercely heated burns ; Around her rolls the lunar orb of light, Trailing her silver glories through the night. On the earth's orbit see the various signs, Mark where the sun, our year completing, shines ; First the bright Ram his languid ray improves ; Next glaring wat'ry thro...