Elements of Physics |
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Common terms and phrases
amount amperes angle apparatus armature ball battery called calories cause cell center of curvature centimeter charge circuit coil colors conductor connected cooling copper cord cylinder density determined diameter direction distance dynamo earth effect electric electromotive force equal EXPERIMENT fall frequency friction galvanometer glass gram heat Hence hydrometer inclined plane increase induced iron kinetic energy lamps length lens light light-waves lines of force liquid luminous magnet mass mercury mirror molecules motion move north pole object ohms parallel pass pendulum piece piston plane plate poles potential poundals pressure produced rays reflected refraction resistance result retina screen shown in Fig solid sonorous body sound sound-waves specific gravity spectrum strikes substance surface suspended tangent galvanometer temperature tion tube unit vapor velocity vibrations voltage voltaic cell volts waves weight Wheatstone bridge wire zinc
Popular passages
Page 190 - The force of attraction or repulsion between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
Page 33 - 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.
Page 87 - Powers, are certain simple instruments, commonly employed for raising greater weights, or overcoming greater resistances, than could be effected by the natural strength without them. These are usually accounted six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw.
Page 53 - Now all know that the intensity of illumination varies inversely as the square of the distance.
Page 113 - It is measured by the quotient arising from dividing the weight of the body by the weight of an equal volume of...
Page 156 - Just as we call the specific gravity of a substance the ratio between its weight and the weight of an equal volume of water...
Page 155 - It overcomes the attractive forces that tend to hold the molecules of a substance together, and thus changes it from a solid to a liquid or from a liquid to a gas, according to the state it was in when the heat was applied.
Page 88 - That is, (1.) The power* is at one end, the weight at the other, and the fulcrum between them. (2.) Power at one end, the fulcrum at the other, and the weight between them. (3) The weight is at one end, the fulcrum at the other, and the power between them.