A Text-book of Physics: Properties of matterC. Griffin, limited, 1902 - 228 pages |
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Common terms and phrases
ABCD acceleration atmospheric axis bending body Boyle's Law bulk modulus capillary tube carbonic acid centre of gravity compressibility constant couple cross-section curvature curve cylinder density determined diameter diffusion diminishes displacement distance drop earth elastic equal equation equilibrium experiments film fluid forces acting gases given glass greater h₁ h₂ hence horizontal increase kinetic energy knife edges layers length liquid Lord Rayleigh measured membrane meniscus mercury metal method moment of inertia motion observed osmotic pressure P₁ parallel parallelopiped pendulum piezometer plane plate position potential energy proportional pull pure water radius result right angles salt shear shown in Fig solution sphere spherical spring square strain suppose surface tension surface-tension tangent tangential stress temperature thickness torsion twist unit area unit volume vapour pressure velocity vertical vessel vibration viscosity weight wire Young's modulus
Popular passages
Page 5 - upon all the gold, to the action of the same upon all the wood ; that is, as the weight of the one to the weight of the other. And the like happened in the other bodies. By these experiments, in bodies of the same weight, I could manifestly have discovered a difference of matter less than
Page 206 - by the tangential force on unit area of either of two horizontal planes at unit distance apart, one of which is fixed, while the other moves with the unit of velocity, the space between being filled with the viscous substance
Page 28 - at such speed that the line from the centre of the sun to the centre of the planet sweeps out equal areas in equal times. This implies, as Newton showed, that the acceleration of the planet is towards the sun and inversely as the square of its distance from that body. Now, comparing the different
Page 124 - the same air being brought to a degree of density about twice as great as that it had before, obtains a spring twice as strong as formerly.
Page 52 - work is this : Imagine the small sphere set with its axis at 45° to that of the other. Then the couple is not greater than one which would take 5J hours to turn it through that 45° to the parallel position, and it would oscillate about that position in not less than 21 hours.
Page 48 - measured the attraction between the crystals and the lead when the axes of the crystals were set in various positions. But the variation in the attraction was merely of the order of error of experiment. In another experiment the attracted masses were small cale spar crystal cylinders weighing a little more than
Page 47 - to gravitation is interposed between two bodies, the lines of force will move into it from each side, and the gravitative pull on a body, near the interposed medium on the side away from the attracting body, will be increased. The apparatus they used was a modified kind of Boys apparatus (Fig.
Page 52 - natural swings due to disturbances would fall in different columns, and so, in the long run, neutralise each other. The results of different days' work might, of course, be added together. There always was a small outstanding effect such as would be produced by a quadrantal couple, but its effect was not always in the
Page 46 - of a diameter parallel to the lines of force, and again the lines are deflected. Similarly, a dielectric body placed in an electric field gathers in the lines of force, and makes the field where the lines enter and leave stronger than it was before.
Page 48 - were lead, each about 1 kgm. These were first in the positions shown by black lines in the figure, and were then moved into the positions shown by dotted lines. The attraction was measured first when merely the air and the case of the instrument intervened, and then when various slabs, each 3 cm. thick, 10 cm. wide and