Introductory Physics |
Common terms and phrases
alternating currents ammeter amperes angle applied armature atmosphere battery bodies of matter called centimeter charges circuit coil colors condenser conductor convex lens cool copper cubic centimeter devices direction distance dynamo earth effect electric electric charges electromotive force energy engine equal Fahrenheit fall familiar fluid focal friction gases glass gram heat Hence inch induced insulated iron lamp lens light waves lines of force liquid magnetic field mass mercury metal meter mirror molecules motion motor moving needle object ohms ordinary particles pendulum pipe piston pitch plate pole potential difference pressure principle pump rays reflected resistance SECTION shows solid sound waves specific gravity speed steam strike string substances surface temperature tion tones tube usually valve vapor vary velocity vibration number voltaic cell volts wave front wave length weight wheel wire zinc
Popular passages
Page 25 - Therefore, the specific gravity of a solid or a liquid body is the ratio of its weight to the weight of an equal volume of water...
Page 162 - A calorie is the amount of heat needed to raise the temperature of one gram of water one degree Celsius.
Page 18 - 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 61 - The Specific Gravity of a substance is the ratio of its weight to that of an equal volume of water.
Page 46 - The areas of two circles are to each other as the squares of their radii. For, if S and S' denote the areas, and R and R
Page 58 - A body immersed in a fluid is acted upon by an upward force equal in magnitude to the weight of the fluid displaced
Page 135 - It is equal to the work done In raising a mass of one pound through a vertical distance of one foot against gravity.
Page 93 - Rate of change of momentum is proportional to the impressed force and takes place in the direction of the straight line in which the force acts. Third Law. — -To every action there is always an equal and opposite reaction.
Page 125 - Likewise, the horizontal distance from the point of support to the center of gravity of the cantilever, a, is proportional to L and may be expressed as a = kJL.
Page 93 - Newton's first law: a body at rest will remain at rest and a body in motion will continue moving at the same speed in a straight line unless acted upon by an external force.