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acceleration amplitude angles of incidence angular beam body Boyle's law bright band called center of inertia circle colors components curve density Desch deviation diatonic scale difference direction displacement distance disturbance elastic ellipse equal equation equilibrium extraordinary ray Figure fluid formula harmonic Hence horizontal hydrometer incidence and reflection interference intervals length lens liquid major third mass medium meters mirror normal octave ordinary ray overtones parallel rays particle pass period perpendicular phase pipe plane plate positive principle prism producing proportional radius rarefaction ratio reflected ray refraction refractive index resultant right angles rotation scale Simple Harmonic Motion simple pendulum specific gravity spectrum speed of light spherical string surface tension tangent tion transmitted triads unit upward pressure velocity of sound vibration vibration-frequencies wave wave-length wave-surface weight Whence zero
Page 23 - Change of motion is proportional to the impressed force, and takes place in the direction of the straight line in which the force acts.
Page 23 - To every action there is always an equal and contrary reaction ; or the mutual actions of any two bodies are always equal and oppositely directed.
Page 26 - moment of a force" with respect to a point is the product of the force and the perpendicular distance from the given point to the line of action of the force.
Page 38 - Show that the moment of inertia of a body about any axis is equal to the moment of inertia about a parallel axis through...
Page 102 - ... turned through any angle about an axis perpendicular to the plane of incidence, the reflected ray will be turned through an angle just twice as great.
Page 24 - ... work done is measured by the product of the Force and the Distance moved in the direction of the force. Thus if a force of 10 Ib. moves a body 2 ft. (along its line of action), it does 20 ft.
Page 61 - ... motion which may be perceived by the ear. According to this definition sound may exist entirely independent of an ear to perceive or a brain to comprehend. 103. Origin of Sound. Sound originates in a vibrating body. " Sound and movement," says Blaserna, " are so correlated that one is strong when the other is strong, one diminishes as the other diminishes, and the one stops when the other stops.
Page 24 - Work is the act of producing a change of configuration in a system in opposition to a force which resists that change.