Definitions in Physics |
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acceleration ampere amplitude axis called circuit coefficient condenser conductor definite density dielectric constant difference of potential direction displacement distance dyne electric current electric field electric intensity electrified bodies electromagnetic unit electromotive force electrostatic unit energy English system equation ether ether-strain theory EUGEN GUTHE fluid gram gravitational heat index of refraction inertia interval joule line of intensity linear lines of induction liquid magnetic field magnetic flux magnetic induction magnetized body measured mechanical medium metric system mutual inductance negative normal numerically equal optical permeability physical quantity plane positive poundal pressure produced quantity of electricity radiation radius ratio rays resistance right angles rotation scalar quantity scale selfinductance shear simple harmonic motion square centimeter student substance surface temperature thermal capacity tube of induction uniform rectilinear motion unit area unit current Unit difference unit pole unit quantity V₁ vector quantity vibration wave front wave length wave motion zero
Popular passages
Page 84 - As a unit of resistance, the international ohm, which is based upon the ohm equal to 10" units of resistance of the CGS system of electromagnetic 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 grams in mass, of a constant cross-sectional area and of the length of 106.3 centimetres.
Page 85 - The international ampere is the unvarying electric current which, when passed through a solution of nitrate of silver in water, deposits silver at the rate of 0.00111800 of a gram per second.
Page 85 - As a unit of electromotive force, the international volt, which is the electromotive force that, steadily applied to a conductor whose resistance is one international ohm, will produce a current of one international ampere...
Page 94 - 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.
Page 2 - The kilogram, symbol kg, is the mass of a platinum/iridium cylinder kept at the International Bureau of Weights and Measures at Sevres, France. The...
Page 86 - 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 50 - It is called the coefficient of thermal conductivity and may be defined as the time rate of heat conduction per unit area per unit temperature gradient. It is numerically equal to the heat transferred in unit time through unit area of a plate of unit thickness, if unit difference of temperature be maintained between its two faces. The numerical value of k depends upon the units chosen for the other quantities. It is said to be expressed in c. G. s. units if H be given in calories, ^ — tz in degrees...
Page 46 - Therefore, it may be stated in general that the boiling point of a liquid is the temperature at which the vapor pressure of a liquid becomes equal to the external pressure acting upon the surface of the liquid.
Page 5 - The specific gravity or relative density of a substance is the ratio of its density to the density of some standard substance.