Elements of Natural Philosophy: A Text-book for High Schools and AcademiesSheldon, 1897 - 456 páginas |
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alternating currents ampere angle apparatus armature axis ball battery body called carbon cell center of mass centimeter circuit coil colors conductor connected convex lens copper wire density diameter difference direction disk distance dynamo edge elasticity electric current electrification electrified electromotive force electroscope equal Experiment feet flame galvanometer galvanoscope glass tube heat hydrometer inches induction coil insulated iron lamp length lens Leyden jar light lines of force liquid magnetic mass measured mercury metal meter mirror molecules motion move needle notice ohms oscillation paper parallel particles passes pendulum piece piston plane plate poles potential poundal pounds pressure produced radiant energy radiation rays reflected refraction represents resistance screen shown in Fig sound spectrum square string strip substance surface suspended temperature thermometer thread tion tone tumbler tuning-fork unit velocity vertical vessel vibration-numbers vibrations voltaic voltaic cell volts wave wave-length weight zinc
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Página 80 - Principle states that a body wholly or partially immersed in a fluid is buoyed up by a force equal to the weight of the fluid displaced by it.
Página 31 - Every body continues in its state of rest, or of uniform motion in a straight line, unless it is compelled to change that state by forces impressed upon it.
Página 275 - At this moment, the strength of the current is proportional to the sine of the angle through which the coil has been turned. The values of the sines may be obtained from a table of natural sines. Such a table is given in the appendix.
Página 46 - Newton generalized the law of attraction into a statement that every particle of matter in the universe attracts every other particle with a force which varies directly as the product of their masses and inversely as the square of the distance between them; and he thence deduced the law of attraction for spherical shells of constant density.
Página 153 - The quantity of heat that will raise the temperature of one pound of water one Fahrenheit degree is equivalent to about 778 footpounds.
Página 39 - ... reflection. When the bodies are perfectly elastic, the angle of incidence is equal to the angle of reflection, and lies in the same plane. When the elasticity of the bodies is imperfect, the angle of reflection is greater than the angle of incidence. If a glass or ivory ball is shot from A against an elastic surface at B, the center of the semicircle, it will be reflected back to C, making the angles, ABD and CBD, equal. If the ball or the body at B is not perfectly elastic (eg, if a lead ball...
Página 212 - The force that is mutually exerted between two charges varies directly as the product of the charges, and inversely as the square of the distance between them.
Página 134 - It consists in the agitation of the molecules of matter, and is generally recognized by the sensation of warmth to which it gives rise.
Página 71 - With the screw, a given power will support a weight as many times as great as itself as the circumference described by the power is times as great as the pitch of the screw.
Página 255 - An increase in the number of the lines of force passing through a closed coil induces a current in one direction through the wire of the coil ; a decrease in the number of the lines of force induces a current in the other direction. (2) The electromotive force of the induced currents depends upon the rapidity of change in the number of lines of force that pass through the coil.