Principles of physicsCentury Company, 1911 - 570 páginas |
Términos y frases comunes
acceleration angle angular acceleration angular velocity applied axis beam body called center of mass charge circuit component condition conductor consider constant convex lens cord density determined difference of potential direction displacement distance electric force electrolysis electromotive force element equal equation equilibrium exerted experiment flux focus formula friction gases Gauss's theorem given heat induction kinetic energy lens light lines of force liquid magnetic field magnetic force measured medium mirror molecules moment of inertia motion moving negative observed obtained opposite parallel particles pass pendulum perpendicular plate polarized pole positive pressure principal planes principle of moments produced proportional quantity R₁ radius ratio refraction represent resultant rotation similar simple harmonic simple harmonic motion sphere string substance surface temperature tension theorem theory tion tubes of force vapor vibrations volume wave length weight wire zero
Pasajes populares
Página 194 - All these things being considered, it seems probable to me that God in the beginning formed matter in solid, massy, hard, impenetrable, moveable particles, of such sizes and figures, and with such other properties and in such proportion to space as most conduced to the end for which he formed them; and that these primitive particles being solids are incomparably harder than any porous bodies compounded of them, even so very hard as never to wear or break in pieces, no ordinary power being able to...
Página 447 - ... surface varies as the cosine of the angle between the normal to the surface and the direction of the radiation.
Página 308 - It is impossible by means of inanimate material agency to derive mechanical effect from any portion of matter by cooling it below the temperature of the coldest of the surrounding objects.
Página 287 - It is hardly necessary to add, that any thing which any insulated body, or system of bodies, can continue to furnish without limitation, cannot possibly be a material substance...
Página 446 - ... is inversely proportional to the square of the distance of the point from the source.
Página 80 - I. Every body continues in its state of rest or of uniform motion in a straight line, except in so far as it may be compelled by impressed forces to change that state.
Página 322 - When a ray of light passes from one medium to another, it is refracted so that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the velocities in the two media.
Página 289 - ... other descriptions, and that there is an equivalence in quantity between the phenomena that have disappeared and those which have been produced, insomuch that if the process be reversed the very same quantity which had disappeared will reappear without increase or diminution. Thus, the amount of heat which will raise the temperature of a pound of water one degree of the thermometer will, if expended...
Página 151 - The radius vector drawn from the sun to a planet sweeps out equal areas in equal times.
Página 469 - It may be added here that, if the direction of the current is from a point of higher potential to a point of lower potential...