 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...  Scientific Dialogues - Página 85por Jeremiah Joyce - 1815Vista completa - Acerca de este libro
 | William Enfield - 1811 - 476 páginas
...with which it strikes the air below it, is equal to this weight, then the re-action of the air upwards is likewise equal to it ; and the bird being acted...its weight, then it will sink with the difference. EXP. Let a clay ball in motion strike another equal to it at rest : The striking body will lose half... | |
 | Jeremiah Joyce - 1815 - 268 páginas
...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 twoequalforces in contrary directions, will rest between them. If the force of the stroke is greater... | |
 | Levi Washburn Leonard - 1827 - 398 páginas
...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...weight, the bird will rise with the difference of these twa forces ; and if the stroke be less than its weight, then it will sink with the difference. In the... | |
 | John Ayrton Paris - 1827 - 332 páginas
...with a force which is equal to its weight, then must there be a reaction of the air, upwards, exactly equal to it ; and the bird, being acted upon by two equal forces, in opposite directions, will, necessarily, rest between them." ' " That is clear enough ; but the bird... | |
 | Levi Washburn Leonard - 1828 - 362 páginas
...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...its weight, then it will sink with the difference. In the act of rowing, the water is struck with the oars, in a direction opposite to that in which the... | |
 | Jeremiah Joyce - 1829 - 278 páginas
...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...difference. CONVERSATION XII. On the Laws of Motion. Charles. Are those laws of motion which you explained yesterday of great importance in natural philosophy... | |
 | Levi Washburn Leonard - 1830 - 350 páginas
...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...its weight, then it will sink with the difference. In the act of rowing, the water is struck witti the oars, in a direction opposite to that in which... | |
 | William Enfield - 1832 - 282 páginas
...with which it strikes the air below it, is equal to this weight, then the re-action of the air upwards is likewise equal to it ; and the bird being acted...will rest between them. If the force of the stroke be greater than its weight, the bird will rise with the difference of these two forces : And if the... | |
 | Levi Washburn Leonard - 1833 - 370 páginas
...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...between them. If the force of the stroke is greater than it* weight, the bird will rise with the difference of these two forces ; and if the stroke be less... | |
 | John Lauris Blake - 1834 - 1028 páginas
...strikes the air below it, is equal to the weight of its body, then the reaction of the air upwards is likewise equal to it, and the bird being acted...force of the stroke is greater than its weight, the hirtl will rise with the difference of these two forces ; and if the stroke be less than its weight,... | |
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