Introductory Course of Natural Philosophy for the Use of Schools and AcademiesBarnes & Burr, 1865 - 504 pages |
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Page 7
... EQUILIBRIUM OF LIQUIDS .. III . APPLICATIONS OF THE PRINCIPLE OF EQUILIBRIUM . IV . - PRESSURE ON SUBMERGED BODIES .. V. - SPECIFIO GRAVITY OF BODIES .... CHAPTER III . MECHANICS OF GASES AND VAPORS . I. THE ATMOSPHERE . II . - MEASURE ...
... EQUILIBRIUM OF LIQUIDS .. III . APPLICATIONS OF THE PRINCIPLE OF EQUILIBRIUM . IV . - PRESSURE ON SUBMERGED BODIES .. V. - SPECIFIO GRAVITY OF BODIES .... CHAPTER III . MECHANICS OF GASES AND VAPORS . I. THE ATMOSPHERE . II . - MEASURE ...
Page 30
... Equilibrium of Forces . 26. When several forces acting upon a body exactly balance each other , they are said to be in equilibrium . Fig . 12 . The simplest case of equilibrium is that of two equal forces acting against each other , as ...
... Equilibrium of Forces . 26. When several forces acting upon a body exactly balance each other , they are said to be in equilibrium . Fig . 12 . The simplest case of equilibrium is that of two equal forces acting against each other , as ...
Page 35
... Equilibrium of the Lever . 31. It is demonstrated in Mechanics ( Art . 78 ) , that the effect of a force produced by the aid of a lever increases as its lever arm increases , so that , if the lever arm be doubled or tripled , the effect ...
... Equilibrium of the Lever . 31. It is demonstrated in Mechanics ( Art . 78 ) , that the effect of a force produced by the aid of a lever increases as its lever arm increases , so that , if the lever arm be doubled or tripled , the effect ...
Page 36
... equilibrium , that they should be to each other inversely as their lever arms . That is , if the power is three times the resistance , the lever arm of the former should only be one third as long as that of the latter , and so on . If ...
... equilibrium , that they should be to each other inversely as their lever arms . That is , if the power is three times the resistance , the lever arm of the former should only be one third as long as that of the latter , and so on . If ...
Page 44
... equilibrium . If a body has but a single point of support , it can be in equilibrium only when its centre of gravity lies somewhere on a vertical through that point . An example is shown in Fig . 23 , which represents a boy balanc- ing ...
... equilibrium . If a body has but a single point of support , it can be in equilibrium only when its centre of gravity lies somewhere on a vertical through that point . An example is shown in Fig . 23 , which represents a boy balanc- ing ...
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acid action angle angle of incidence apparatus atmosphere attraction axis ball barometer battery becomes body boiling called camera obscura carbonic acid catgut causes centre of gravity centrifugal force colors compressed concave condenser conductor consists convex convex lens copper cord cylinder density Describe direction distance earth effect elastic electricity electrified electrometer equal equilibrium example expansion experiment Explain flow fluid force galvanometer gases glass heat Hence hygrometer Illustrate inch inclined plane instrument iron latent heat lens lenses lever Leyden jar light liquid machine magnet Manometer mercury metal mirror motion needle object particles passes pendulum pipe piston placed plane plate poles position pressure principal focus principle produce pulley quantity radiation rays reflected reflector refraction resistance shown in Fig solid sound specific gravity steam surface telescope temperature tension thermometer tion transmitted tricity tube valve vapor velocity vessel vibrations weight wheel whilst wire zinc
Popular passages
Page 146 - Archimedes stated that a body immersed in a fluid is buoyed up by a force equal to the weight of the displaced fluid.
Page 145 - A body immersed in a liquid is buoyed up by a force equal to the weight of the liquid displaced by it.
Page 13 - IMPENETRABILITY is that property by virtue of which no two bodies can occupy the same place at the same time. This property is self-evident, although phenomena are observed which would seem to conflict with it. Thus, when a pint of alcohol is mixed with a pint of water, the volume of the resulting mixture is less than a quart. This...
Page 184 - ... air and the smallness of the tube. The bulb is therefore heated, when the air within expands, and a portion escapes in bubbles through the mercury. On cooling, the pressure of the external atmosphere forces a quantity of mercury through the tube into the bulb. By repeating this operation a few times, the bulb and a portion of the tube are filled with mercury. The whole is then heated till the mercury boils, thus filling the tube, when the funnel is melted off and the tube hermetically sealed...
Page 36 - Newton generalized the law of attraction into a statement that every particle of matter in the universe attracts every other particle with a force which varies directly as the product of their masses and inversely as the square of the distance between them; and he thence deduced the law of attraction for spherical shells of constant density.
Page 160 - Sounds are propagated better in calm than in stormy weather, also with more intensity in the direction of the wind than in the contrary direction. A modification of the law, that the intensity of sound varies inversely as the square of the distance, takes place when sound is caused to travel through long smooth tubes. The sound moves like the rings produced in a pool of water by a falling stone: they...
Page 271 - The following definitions apply equally to concave and convex mirrors : The middle point of the mirror is called its vertex. The centre of the sphere, of which the mirror forms a part, is called the optical centre.
Page 437 - Two wires, one connected with the positive, and the other with the negative pole of a...
Page 280 - ... 1. The planes of incidence and refraction coincide, both being normal to the surface separating the media, at the point of incidence. 2. The sine of the angle of incidence is equal to the sine of the angle of refraction multiplied by a constant quantity.
Page 215 - The heat which is expended in changing a body from the solid to the liquid state, or from the liquid to the gaseous state, is called latent heat.