Physics: A Textbook for CollegesGinn, 1924 - Počet stran: 723 |
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Běžně se vyskytující výrazy a sousloví
acceleration amperes angle angular angular velocity atoms axis ball body Boyle's law British thermal units called calories cell centimeters charge circuit coefficient coil compressed Compute condenser conductor constant copper cubic density difference of potential direction distance dynes earth electric electromotive force electroscope equal equation example expansion experiment feet flow force acting friction gases given glass gram Hence induced iron joules kinetic energy length lens light liquid magnetic field mass measured mercury method mirror molecules momentum motion moving Ohm's law ohms parallel pendulum piston placed plate pole pounds pressure principle produced pump quantity radiation radius rays resistance rotation shown in Fig simple simple harmonic motion specific gravity speed starting friction student substance surface surface tension temperature thermometer tion tube units vector velocity vibration voltage volts volume water vapor wave-length waves weight wire
Oblíbené pasáže
Strana 544 - 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.
Strana 395 - ... you will find it stream out plentifully from the key on the approach of your knuckle. At this key the phial may be charged; and from electric fire thus obtained, spirits may be kindled, and all the other electric experiments be performed, which are usually done by the help of a rubbed glass globe or tube, and thereby the sameness of the electric matter with that of lightning completely demonstrated.
Strana 154 - Newton's law of universal gravitation states that every particle in the Universe attracts every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
Strana 463 - As a unit of current, the international ampere, which is onetenth of the unit of current of the cgs system of electromagnetic units, and which is represented sufficiently well for practical use by the unvarying current which, when passed through a solution of nitrate of silver in water, and in accordance with accompanying specifications, deposits silver at the rate of 0.001118 of a gramme per second.
Strana 544 - The International Volt is the electrical pressure which, when steadily applied to a conductor the resistance of which is one international ohm will produce a current of one international ampere.
Strana 229 - The specific heat of a substance is defined as the number of calories required to raise the temperature of 1 gram of the substance 1° C.
Strana 45 - A body immersed in a fluid is buoyed up with a force equal to the weight of the displaced fluid.
Strana 87 - The rate of change of the momentum of a body is proportional to the force acting on the body and is in the direction of the force.
Strana 227 - BTU, as defined above, and the quantity of heat required to change the temperature of 1 pound of water 1 degree...
Strana 583 - Fig. 97 that the intensity of illumination varies inversely as the square of the distance of the surface from the light source. Thus E = CP/D...