elementary treatise on nautral philosophy1873 |
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Página iv
... Hence arises consider- able difficulty in selecting the most essential points and those which best represent the present state of science . I have done my best to cope with this difficulty , and I trust that the reader who attentively ...
... Hence arises consider- able difficulty in selecting the most essential points and those which best represent the present state of science . I have done my best to cope with this difficulty , and I trust that the reader who attentively ...
Página 18
... Hence we are led to a special mechanical element , involving the joint consideration of force and the displacement of its point of application . This element is called work . The work done by a force is the product of the force into the ...
... Hence we are led to a special mechanical element , involving the joint consideration of force and the displacement of its point of application . This element is called work . The work done by a force is the product of the force into the ...
Página 21
... Hence a solid body forms a firmly connected whole , so that the movement of one of its parts produces motion in the rest . Liquids , on the contrary , appear to be formed of particles which are independent of each other and can obey ...
... Hence a solid body forms a firmly connected whole , so that the movement of one of its parts produces motion in the rest . Liquids , on the contrary , appear to be formed of particles which are independent of each other and can obey ...
Página 23
... hence that molecular equilibrium depends only on the distances between the centres of the spheres . In solids , much depends upon the form and relative disposition of the molecules . It would seem as if these molecules ( according to ...
... hence that molecular equilibrium depends only on the distances between the centres of the spheres . In solids , much depends upon the form and relative disposition of the molecules . It would seem as if these molecules ( according to ...
Página 26
... Hence , in comparison with gases , they have often been called incompressible fluids . It is easy with the aid of Ersted's apparatus , represented in section in Fig . 12 , to show that liquids are more compres- sible than solids , and ...
... Hence , in comparison with gases , they have often been called incompressible fluids . It is easy with the aid of Ersted's apparatus , represented in section in Fig . 12 , to show that liquids are more compres- sible than solids , and ...
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...