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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 electromotive force electroscope equal Experiment feet flame foot-pounds galvanometer galvanoscope glass tube heat hydrometer inches induction coil insulated iron lamp length lens lever 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 principal focus 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 vapor velocity vertical vessel vibrations volts wave-length waves weight zinc
Page 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.
Page 277 - The strength of the current is proportional to the tangent of the angle of deflection.
Page 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.
Page 153 - The quantity of heat that will raise the temperature of one pound of water one Fahrenheit degree is equivalent to about 778 footpounds.
Page 151 - ... the amount of heat required to raise the temperature of the same weight of water one degree.
Page 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.
Page 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.
Page 39 - A (Fig. 25) 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 is used), the angle of reflection will be greater than the angle of incidence.