Fifth Book of Lessons for the Use of the Irish National SchoolsP. Dixon Hardy, 1836 - 406 oldal |
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274. oldal
... fulcrum , which means prop . And lastly , the respective velocities of the power , and of the resistance . " a THE LEVER . The lever is an inflexible rod or beam , that is to say , one which will not bend in any direction . For instance ...
... fulcrum , which means prop . And lastly , the respective velocities of the power , and of the resistance . " a THE LEVER . The lever is an inflexible rod or beam , that is to say , one which will not bend in any direction . For instance ...
275. oldal
... fulcrum , is also the centre of motion . The two parts of a lever , divided by the fulcrum , are called its arms . Now , both scales being empty , they are of the same weight , and con- sequently balance each other . We have stated that ...
... fulcrum , is also the centre of motion . The two parts of a lever , divided by the fulcrum , are called its arms . Now , both scales being empty , they are of the same weight , and con- sequently balance each other . We have stated that ...
276. oldal
... fulcrum . When a lever is put in motion , the longer arm , or acting part of the lever , must move with greater velocity than the shorter arm , or resisting part of the lever , because it is further from the centre of motion . When two ...
... fulcrum . When a lever is put in motion , the longer arm , or acting part of the lever , must move with greater velocity than the shorter arm , or resisting part of the lever , because it is further from the centre of motion . When two ...
277. oldal
... fulcrum or centre of mo- tion . It would be impossible for one child to rise per- pendicularly to the point A , or for the other to descend in a straight line to B ; they each describe arcs of their respective circles ; and it may be ...
... fulcrum or centre of mo- tion . It would be impossible for one child to rise per- pendicularly to the point A , or for the other to descend in a straight line to B ; they each describe arcs of their respective circles ; and it may be ...
278. oldal
... fulcrum ; and the nearer the latter is to the resistance , the more easily will the power be able to move it . There are three different kinds of levers ; in the first , which comprehends the several levers we have de- scribed , the fulcrum ...
... fulcrum ; and the nearer the latter is to the resistance , the more easily will the power be able to move it . There are three different kinds of levers ; in the first , which comprehends the several levers we have de- scribed , the fulcrum ...
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Gyakori szavak és kifejezések
afterwards Amaziah animals appear army Asia Athaliah Athenians atmosphere attraction Babylon body bones called caloric centre century Christianity colour commenced Darius Darius Hystaspes death defeated deposited descend died Dioclesian direction distance divided earth Egypt emperor empire equal equator exist fall fluid force fossil fulcrum globe gravity Greece Greek heat invaded islands Israel Jehoiakim Jehoram Jehoshaphat Jerusalem Joash Judah king kingdom kingdom of Judah land length lever liquid Macedon matter Maximian metals miles mirror moon motion mountains muscles nature Nebuchadnezzar object ocean orbit organs particles pass Persian plants possession pressure prince produced Ptolemy quadrupeds quantity rays of light reflected refracted reign remains resistance retina revolution rise river rocks Romans Rome round shells soon species specific gravity strata substance succeeded surface Syria teeth temple throne tion tribes vapour vegetable velocity Vespasian vessels weight whole
Népszerű szakaszok
377. oldal - Unanxious for ourselves, and only wish As duteous sons, our fathers were more wise. At thirty man suspects himself a fool ; Knows it at forty, and reforms his plan ; At fifty chides his infamous delay, Pushes his prudent purpose to resolve; In all the magnanimity of thought Resolves and re-resolves; then dies the same.
381. oldal - Tis but an hour ago since it was nine/ And after one hour more 'twill be eleven/ And so, from hour to hour, we ripe and ripe And then from hour to hour, we rot and rot, And thereby hangs a tale.
379. oldal - Now, my co-mates and brothers in exile, Hath not old custom made this life more sweet Than that of painted pomp? Are not these woods More free from peril than the envious court? Here feel we but the penalty of Adam, — The seasons...
401. oldal - midst falling dew, While glow the heavens with the last steps of day, Far, through their rosy depths, dost thou pursue Thy solitary way ? Vainly the fowler's eye Might mark thy distant flight to do thee wrong, As, darkly painted on the crimson sky, Thy figure floats along.
380. oldal - The seasons' difference ; as, the icy fang, And churlish chiding of the winter's wind ; Which when it bites and blows upon my body, Even till I shrink with cold, I smile, and say, — This is no flattery : these are counsellors, That feelingly persuade me what I am.
380. oldal - I'd have you do it ever : when you sing, I'd have you buy and sell so ; so give alms ; Pray so ; and, for the ordering your affairs, To sing them too. When you do dance, I wish you A wave o...
402. oldal - Thou'rt gone, the abyss of heaven Hath swallowed up thy form ; yet, on my heart Deeply hath sunk the lesson thou hast given, And shall not soon depart. He who, from zone to zone, Guides through the boundless sky thy certain flight, In the long way that I must tread alone, Will lead my steps aright.
397. oldal - THE way was long, the wind was cold, The Minstrel was infirm and old; His withered cheek, and tresses gray, Seemed to have known a better day ; The harp, his sole remaining joy, Was carried by an orphan boy.
401. oldal - There is a Power whose care Teaches thy way along that pathless coast, The desert and illimitable air, Lone wandering, but not lost. All day thy wings have fanned, At that far height, the cold thin atmosphere; Yet stoop not, weary, to the welcome land, Though the dark night is near.
383. oldal - WHEN I consider how my light is spent Ere half my days in this dark world and wide, And that one Talent which is death to hide Lodged with me useless, though my soul more bent To serve therewith my Maker, and present My true account, lest He returning chide, " Both God exact day-labour, light denied ?