Heat, electricity, and magnetismAllyn and Bacon, 1896 - Physics |
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Common terms and phrases
absorbed acid alternating currents amperes angle armature attraction axis bismuth body boiling point C.G.S. units carbon cathode cell centimetre charge coefficient coil condenser conductivity conductor connected constant copper counter E.M.F. current flows curve cylinder Daniell cell deflection density dielectric direction discharge disk distance effect electric current electrification electrode electrolytic electromagnetic electromotive force energy equal equation freezing galvanometer gases glass helix Hence hydrogen increase induction insulated iron junction Leyden jar light lines of force liquid magnetic circuit magnetic field magnetic flux magnetic force mass measured melting mercury metal molecular molecules motion needle negative Ohm's law parallel pass placed plane plate platinum polarization pole positive potential difference pressure produced proportional quantity of heat radiant heat radiation resistance rotation silver solution specific heat sphere square substance sulphuric surface temperature thermal capacity thermometer thermopile tion tube vapor volume wire zero zinc
Popular passages
Page 150 - Avogadro's law states that equal volumes of all gases at the same temperature and pressure contain the same number of molecules...
Page 278 - As a unit of resistance, the international 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.
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 145 - 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 145 - 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 222 - Hence the specific inductive capacity of a substance is the ratio of the capacity of a condenser when its plates are separated by this substance to the capacity of the same condenser when its plates are separated by air.
Page 263 - If the same quantity of electricity passes through different electrolytes, the masses of the different ions deposited will be proportional to the chemical equivalents of the ions. Thus if the same current pass through acidulated water, copper sulphate, and silver nitrate in succession, then for each gramme of hydrogen collected there will be 8 grammes of oxygen, 31 '6 of copper, and 108 of silver.
Page 54 - ... the product of the specific heat by the atomic weight is the same for all the elementary substances.
Page 130 - The whole theory of the motive power of heat is founded on the two following propositions, due respectively to Joule, and to Carnot and Clausius. PROP. I. (Joule). — 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.