Physical Review, Band 1American Physical Society, 1913 Vols. for 1903- include Proceedings of the American Physical Society. |
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Häufige Begriffe und Wortgruppen
aluminium AMERICAN PHYSICAL SOCIETY amperes apparatus atomic axis c₂ calculated calorimeter cathode cent charge coil constant cylinder decrease deflection demagnetization density determined diameter discharge electric electrode distance electrometer electromotive force electrons energy equation error ether experimental experiments film flask fluidity flux formula galvanometer given gives Hall effect heat hydrogen hysteresis hysteresis curve increase induction intensity investigation ionization ions iron length light linear magnetic field mass maximum means measured metal method mixture molecular molecules monel motion Nernst effect nichrome observed obtained oscillation oscillographic paper pearlite Phil phosphorescent photo-electric cell photo-electric effect Phys Physical Society plate platinum potassium potential pressure radiation ratio rays relation resistance resonators S₁ shown shows sodium specimen steel substances surface TABLE Temp temperature theory of relativity thermometer tion tube vapor variation velocity viscosity voltage volts wave-length wire
Beliebte Passagen
Seite 480 - ... should be so chosen that the ratio between the heat conductivity and the electrical resistance is the same in both, (3) the...
Seite 164 - Bt relative to its starting point on S2 as measured by A is equal to the change of velocity of BI relative to its starting point on Si as measured by C. Now velocity is equal to the ratio of distance to time: and in the direction perpendicular to the line of relative motion of the two systems the units of length are equal; but the units of time are unequal. Hence to either of the observers the change of velocity...
Seite 191 - I have no intention of asserting that time is a fourth dimension of space in the sense in which we ordinarily employ the word "dimension"; such a statement would have no meaning. I wish to point out rather that it is in some measure connected with space, and that in many formulae it must enter as it would if it were essentially and only a fourth dimension.
Seite 107 - A'B' in Fig. 19 represent two fluidity curves, parallel to each other and therefore presumably representing members of the same class of substances, and let a third fluidity curve CD be at an angle to the other two to represent a substance in another class. Since we have elected to compare absolute temperatures at a fluidity of 200, this amounts to comparing the intercepts of the curves on the line AD, whose equation is <p = 200. The corresponding viscosity curves obtained by taking the reciprocal...
Seite 167 - ... depends on the direction of equilibrium of the bar, that Is, it depends on the way in which the bar is attached to the wire; hence, if the potential energy as observed by A were proportional to 0'* it would depend on the way in which the bar is attached.
Seite 192 - S' is given by the equation , y', z', t') = o and we desire to know the expression of this law on S. We substitute for x', y', z', t', their values in terms of x, y, z, t given above; and thus obtain an equation stating the law in question. From these considerations it appears that in many of our problems, namely, in those which have to do at once with two or more systems of reference, the time and space variables taken together play the rdle of four variables each having to do with one dimension...
Seite 406 - Aa are independent of each other, the principle may be stated in two parts : I. The sum of all the external linear actions to which a body or a part of a body is subject at any instant vanishes : SA, = o . (A,) II.
Seite 173 - ... theoretical basis of a new experimental investigation which has not yet been carried out, one which bears the same essential relation as that of Bucherer to the confirmation or disproof of the entire theory of relativity. The object of this section is to indicate the nature of this experiment. Let eo denote the charge of an electron when at rest with respect to a given system of reference. When it is in motion with a velocity v let t(e,) and...
Seite 107 - Since we have elected to compare absolute temperatures at a fluidity of 200, this amounts to comparing the intercepts of the curves on the line AD, whose equation is <p = 200. The corresponding viscosity curves obtained by taking the reciprocal values of the above fluidities and multiplying by 10,000 are represented by ab, a'b', and cd; and ad is of course the reciprocal of the line AD. But the point a and the point where the curve a'b' crosses ad are points of equal slope on the viscosity curves,...
Seite 269 - C\, which was annealed under H = 18.5 (26.4 ampere-turns per inch) from 835° C. down to 200° C., showed an increase of permeability over that of C2 of about the same per cent, as the other samples. The phenomenon of aging is now of course well recognized in the behavior of iron, and in carbon steels operating under working temperatures an increase of 50 per cent, or more in losses with a corresponding decrease of permeability, is not uncommon. This is due to a gradual alteration of the structure...