Physics for university students v. 2, Volume 2Allyn and Bacon, 1904 |
Common terms and phrases
absorbs acid amperes angle armature atmosphere axis body boiling point C.G.S. units carbon dioxide cathode centimetre charge coefficient coil condenser conductivity conductor connected constant cooled copper curve Daniell cell density dielectric direction discharge disk distance effect elec electric current electrification electrode electrolyte electromagnetic electromotive force energy equal equation expansion flux freezing galvanometer gases glass helix Hence hydrogen increase induction insulated inversely ions iron junction Leyden jar light lines of force liquid magnetic circuit magnetic field magnetic force mass means measured melting mercury metal molecular molecules motion needle negative oscillations oxygen parallel pass Peltier effect perature placed plane plate platinum polarization pole positive potential difference pressure produced quantity of heat radiation resistance rotation silver solid solution specific heat sphere square substance sulphur surface temperature thermal capacity thermometer thermopile tion tube V₁ voltaic cell volume wire zero zinc
Popular passages
Page 31 - Avogadro's principle or hypothesis, which states that equal volumes of all gases under the same conditions of temperature and pressure contain the same number of molecules, was the extension of Dalton's Atomic Theory necessary to put the theoretical interpretation of chemistry on a solid foundation.
Page 274 - Henry, which is the induction in a circuit when the electro-motive force induced in this circuit is one international volt while the inducing current varies at the rate of one Ampere per second.
Page 4 - It is hardly necessary to add, that anything which any insulated body, or system of bodies, can continue to furnish without limitation, cannot possibly be a material substance ; and it appears to me to be extremely difficult, if not quite impossible, to form any distinct idea of anything capable of being excited and communicated in the manner the Heat was excited and communicated in these experiments, except it be MOTION.
Page 228 - Conceive the current flowing in the direction of the extended fingers of the outstretched right hand, with the palm turned toward the needle ; then the N pole will be acted on by a magnetic force in the direction of the extended thumb. 283. Maxwell's Rule The rule suggested by Maxwell has the advantage that it expresses reciprocally the relation between the direction of the current and the direction of the deflection. Consider a right-handed screw; if Fig.
Page 91 - It is impossible for a self-acting machine, unaided by any external agency, to convey heat from one body to another at a higher temperature ; or heat cannot of itself (that is, without compensation) pass from a colder to a warmer body.
Page 91 - 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.
Page 92 - When equal quantities of mechanical effect are produced by any means whatever from purely thermal sources, or lost in purely thermal effects, equal quantities of heat are put out of existence or are generated.
Page 174 - If the same quantity of electricity passes through different electrolytes, the masses of the different ions liberated at the electrodes are proportional to their chemical equivalents. Thus, if the same current passes through a series of electrolytic cells, in which it liberates as ions hydrogen, chlorine, copper, and silver, then for every gramme of hydrogen set free, 35.46 gms. of chlorine, 31.7 of copper, and 107.9 of silver will be separated. The electro-chemical equivalent of an ion is the number...
Page 36 - This law has been found to hold approximately true for most of the elements which occur in the solid state at ordinary temperatures, if the specific heats be taken at temperatures sufficiently below the point of fusion. For thirty-two of these substances the mean product is 6.38 and the extremes are 6.76 and 5.7. The atomic weight of hydrogen is the unit. Since the specific heats of solids are not constant, but vary with the temperature and the physical state, it is to be expected that the product...
Page 188 - Ohm. which is based upon the ohm equal to 109 units of resistance of the CGS system of electro-magnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice, 14.4521 grammes in mass, of a constant cross-sectional area, and of a length of 106.3 centimetres.