Natural Philosophy: Lessons in PhysicsBecktold Print. Company, 1897 - 372 من الصفحات |
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عبارات ومصطلحات مألوفة
angle aqueous vapor atmospheric pressure attraction axle ball barometer body boiling called causes center of curvature center of gravity centrifugal force cohesion cold colors common pump compressed concave condensed conductors convex lens cool cork crystalline lens cylinder direction distance downward earth elastic electricity electrified engine equilibrium expansive EXPERIMENT fall Familiar Facts filled with water flame flask force freezing-point friction glass tube heat Hence Heron's fountain image formed immersed inches inclined plane inverted iron length LESSON lever liquid luminous point magnet mercury metal mirror motion move object oscillations Papin's particles passes pendulum piece piston placed plate pole pound prism produced rays of light reflected ray refracted refracted rays retina rise secondary axis solid sound space specific gravity spectrum steam stove string substance surface suspended temperature thermometer tion tricity tumbler vacuum valve velocity vertical vessel vibrations weight wheel wire
مقاطع مشهورة
الصفحة 264 - It can engrave a seal, and crush masses of obdurate metal like wax before it — draw out, without breaking, a thread as fine as gossamer, and lift a ship of war like a bauble in the air. It can embroider muslin, and forge anchors, cut steel into ribands, and impel loaded vessels against the fury of the winds and waves.
الصفحة 366 - ... straight through the cork, so that it may be truly central. Of the proper direction the eye will be the best judge : and when the cork-borer has penetrated some little way, it will be advisable to turn the cork a quarter round, in order that it may be seen whether the axis of the cork-borer and of the cork are still in the same straight line. If not, a slight pressure on the cork-borer in one direction or the other will set it straight.
الصفحة 365 - It now remains to fit these tubes — the bent tube and the jet — to the bottle by means of a cork having two holes. Take a good, sound cork, about an inch in diameter, squeeze it until it becomes soft and elastic (a pair of pliers or nut-crackers will serve the purpose of a regular cork-squeezer), then take it up between the second finger and the thumb of the left hand, and place the sharpened end of the smallest cork-borer against it, one end of the cork midway between the center and the edge....
الصفحة 365 - ... of a regular cork-squeezer), then take it up between the second finger and the thumb of the left hand, and place the sharpened end of the smallest cork-borer against it, one end of the cork midway between the center and the edge. Urge the cork-borer into the cork with a twisting motion, as if you were using a corkscrew. Some care will be required to make the hole straight through the cork, so that it may be truly central. Of the proper direction the eye will be the best judge. And when the...
الصفحة 121 - It is measured by the quotient arising from dividing the weight of the body by the weight of an equal volume of...
الصفحة 303 - Any transparent medium bounded by sur2 3456 faces of which at least one is curved, is a lens. Lenses are of two classes, converging and diverging, according as they collect rays or cause them to diverge. Each class comprises three kinds (Fig.
الصفحة 116 - Rules for Calculating Liquid Pressure against the Bottom and Sides of a Containing Vessel. The total pressure due to gravity on any portion of the horizontal bottom of a vessel containing a liquid is equal to the weight of a column of the same liquid whose base is the area of that portion of the bottom pressed upon, and whose hight is the depth of the water in the vessel.
الصفحة 282 - The disciples of Plato contributed not a little to the advancement of optics, by the important discovery they made, that light emits itself in straight lines, and that the angle of incidence is always equal to the angle of reflection. Plato terms colours " the effect of light transmitted from bodies, the small particles of which were adapted to the organ of sight.
الصفحة 120 - The ratio of the weight of a certain volume of liquid to the weight of the same volume of water is called the specific gravity of the liquid.
الصفحة 196 - It is the pressure required to maintain a current of one ampere through a resistance of an ohm.