elementary treatise on nautral philosophy1873 |
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Página 9
... move in the same direction and with the same velocity . If , then , we see a material point which was at rest begin to move , or if we observe any change in the motion of a point , we say that it has been acted on by a force . Without ...
... move in the same direction and with the same velocity . If , then , we see a material point which was at rest begin to move , or if we observe any change in the motion of a point , we say that it has been acted on by a force . Without ...
Página 10
... move , and is thus thrown forward . When we fix the head of a hammer on the handle by striking the end of the handle on the ground , we utilize the inertia of matter . INERTIA , FORCE . 11 In fact , at the 10 MECHANICS .
... move , and is thus thrown forward . When we fix the head of a hammer on the handle by striking the end of the handle on the ground , we utilize the inertia of matter . INERTIA , FORCE . 11 In fact , at the 10 MECHANICS .
Página 11
... move , and ends after some blows by becoming firmly fixed . 8. Mechanics . — All physical phenomena fundamentally consist in motions ; but these motions are in many cases too minute to admit of direct observation , and are only inferred ...
... move , and ends after some blows by becoming firmly fixed . 8. Mechanics . — All physical phenomena fundamentally consist in motions ; but these motions are in many cases too minute to admit of direct observation , and are only inferred ...
Página 35
... move under the action of gravity . This point is the centre of gravity , and the property in question is an obvious consequence of the mechanical definition already given . But this property may itself be used as the definition of the ...
... move under the action of gravity . This point is the centre of gravity , and the property in question is an obvious consequence of the mechanical definition already given . But this property may itself be used as the definition of the ...
Página 41
... move along the inclined plane ABC . The weight of the body M being represented by MP , it can , ( by § 16 ) , be decomposed into two other forces , viz . MN per- pendicular to the plane , which is destroyed by the resistance of the ...
... move along the inclined plane ABC . The weight of the body M being represented by MP , it can , ( by § 16 ) , be decomposed into two other forces , viz . MN per- pendicular to the plane , which is destroyed by the resistance of the ...
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...