elementary treatise on nautral philosophy1873 |
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Página 19
... employ little time in producing a given amount of work . The unit employed for expressing the rate of working of a machine is the horse - power , and denotes 33,000 foot - pounds of work done per minute or 550 foot - pounds per second ...
... employ little time in producing a given amount of work . The unit employed for expressing the rate of working of a machine is the horse - power , and denotes 33,000 foot - pounds of work done per minute or 550 foot - pounds per second ...
Página 44
... employed in describing them . If we use the indefinite symbol K to denote the space described in the first unit of time , the space described in the time t will be given by the formula s = Kt2 . ( 1 ) 35. Velocities . - Attwood's ...
... employed in describing them . If we use the indefinite symbol K to denote the space described in the first unit of time , the space described in the time t will be given by the formula s = Kt2 . ( 1 ) 35. Velocities . - Attwood's ...
Página 48
... employed in their description . We may remark that the proportionality of the vertical lines to the squares of the ... employ , but shall content ourselves with remarking that the law of velocities is a logical consequence of the law of ...
... employed in their description . We may remark that the proportionality of the vertical lines to the squares of the ... employ , but shall content ourselves with remarking that the law of velocities is a logical consequence of the law of ...
Página 59
... employing balls suspended by threads of different lengths , Galileo discovered the influence of length on the time of ... employed by Foucault at the Pantheon in his celebrated experiments on the rotation of the earth . This law of ...
... employing balls suspended by threads of different lengths , Galileo discovered the influence of length on the time of ... employed by Foucault at the Pantheon in his celebrated experiments on the rotation of the earth . This law of ...
Página 79
... employed as a motive power ( in the steam - engine , for example ) , a quantity of heat is destroyed equivalent , on the same scale , to the work produced . Another kind of energy is developed when friction is employed as a means of ...
... employed as a motive power ( in the steam - engine , for example ) , a quantity of heat is destroyed equivalent , on the same scale , to the work produced . Another kind of energy is developed when friction is employed as a means of ...
Términos y frases comunes
acid action amount angle apparatus atmosphere atmospheric pressure axis barometer battery body Boyle's law called calorimeter carbonic acid centre of gravity circuit coil column compressed condensation conductor connected consists copper cylinder denote density diminished direction distance earth effect electricity electro-motive force employed equal equilibrium expansion experiment formula gases given glass globe Hence horizontal hygrometer inch increase instrument insulated latent heat length lens Leyden jar light liquid lower machine magnet means measured mercury metal millimetres mirror motion needle negative observed obtained opposite parallel particles passes pendulum piston placed plane plate pole portion position potential pressure produced proportional quantity ratio rays reflected refraction represented in Fig resistance result rotation side solid specific gravity specific heat steam substance sulphuric acid suppose surface telescope temperature tension thermometer tion tube vapour velocity vertical vessel vibrations volume weight wire zinc
Pasajes populares
Página 286 - Its banks and its bottom are of cold water, while its current is of warm. The Gulf of Mexico is its fountain, and its mouth is in the Arctic seas. It is the Gulf Stream. There is in the world no other such majestic flow of waters. Its current is more rapid than the Mississippi or the Amazon, and its volume more than a thousand times greater.
Página 499 - It is better, on this account, in graduating the bottle, to make two scratches as represented in the drawing, one at the top and the other at the bottom of the curve : this prevents any future mistake.
Página 437 - Q are related by р/с' = constant, where y is the ratio of specific heat at constant pressure to specific heat at constant volume, for compressible fluids.
Página 633 - Unlike sea water, brackish waters differ in quality, quantity, and composition not only from place to place, but also from time to time even at a given location.
Página 910 - R' P', SP, will have a constant ratio ; or the sines of the angles of incidence and refraction are in a constant ratio.
Página 218 - The resistance which is opposed to a pump rod in raising water, is ~equal to the weight of a column of water whose base is the area of the piston, and...
Página 315 - A GLACIER is AN IMPERFECT FLUID, OR A VISCOUS BODY. WHICH IS URGED DOWN SLOPES OF A CERTAIN INCLINATION BY THE MUTUAL PRESSURE OF ITS PARTS.
Página 9 - The principle of inertia is an abstract principle which must be considered as applicable to a single isolated particle. It may be enounced in the following terms: — An isolated 'material point cannot change its state, whether of rest or motion. That is to say, if it be at rest it will remain at rest; if it be in motion it will continue to move in the same direction and with the same velocity.
Página 92 - If a vessel full of water, closed on all sides, has two openings, the one a hundred times as large as the other, and if each be supplied with a piston which fits exactly, a man pushing the small piston will exert a force which will equilibrate that of a hundred men pushing the Pig. 49.— Pascal's Principle. piston which is a hundred times as large, and will overcome that of ninety-nine.
Página 71 - It is the curve which is traced by a point in the circumference of a circle which rolls along a straight line. The...