A Textbook of Physics, Volume 1C. Griffin, 1902 - 345 pages |
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Common terms and phrases
ABCD acceleration 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 kilogramme kinetic energy knife edges layers length liquid Lord Rayleigh measured membrane meniscus mercury metal method molecules moment of inertia 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 strain suppose surface tension surface-tension T₁ 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 126 - We took then a long glass tube, which, by a dexterous hand and the help of a lamp, was in such a manner crooked at the bottom, that the part turned up was almost parallel to the rest of the tube...
Page 7 - ... 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 the thousandth part of the whole, had any such been.
Page 126 - This done, we began to pour quicksilver into the longer leg of the syphon, which, by its weight pressing up that in the shorter leg, did by degrees straighten the included air ; and continuing this pouring in of quicksilver till the air in the shorter leg was by condensation reduced to take up but half the space it possessed (I say possessed, not filled) before, we cast our eyes upon the longer leg of the glass...
Page 208 - Maxwell denned the coefficient of viscosity as follows: "The coefficient of viscosity of a substance is measured 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 unit velocity, the space between being filled with the viscous substance.
Page 54 - The semicircular couple is not greater than one which would turn from crossed to parallel position in 4£ hours, and it would oscillate about that position in not less than 17 hours. Or, if the gravitation is less in the crossed than in the parallel position, and in a constant ratio, the difference is less than 1 in 16,000 in the one case and less than 1 in 2800 in the other. We may compare with these numbers the difference of rate of travel of yellow light through a quartz crystal along the axis...
Page 39 - As I was convinced of the necessity of guarding against this source of error, I resolved to place the apparatus in a room which should remain constantly shut, and to observe the motion of the arm from without, by means of a telescope; and to suspend the leaden weights in such manner, that I could move them without entering into the room. This difference in the manner of observing, rendered it necessary to make some alteration in Mr. Michell's apparatus; and, as there were some...
Page 142 - Tu must be less than the sum of the other two. If this condition is not fulfilled the liquid B will spread over the surface A. Rise of a Liquid in a Capillary Tube.— We can apply the result we have just obtained to find the elevation or depression of a liquid in a tube which it does not wet and with which it has a finite angle of contact. Suppose h is the height of the fluid in the tube above the horizontal surface of the fluid outside, when there is equilibrium ; and suppose that r is the radius...
Page 126 - ... height of the mercurial cylinder in the longer leg that compressed the air into those dimensions. C. The height of the mercurial cylinder that counterbalanced the pressure of the atmosphere. D. The aggregate of the two last columns, B and C, exhibiting the pressure sustained by the included air. E. What that pressure should be according to the hypothesis that supposes the pressures and expansions to be in reciprocal proportion.