Fourteen Weeks in PhysicsA.S. Barnes, 1878 - 305 من الصفحات |
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عبارات ومصطلحات مألوفة
acid aqueous humor armature atoms attraction ball battery becomes body causes centre of gravity chemical cohesion coil colors condensed convex convex lens copper cord cornea crystalline lens Define Describe distance drop earth effect elastic elec electric force electro-magnet experiments fall feet friction galvanic gases glass tube gutta-percha heat hydrogen illustrations inches inclined plane insulated iron law of equilibrium length lens lever Leyden jar lift liquid matter mercury metal miles mirror molecules motion move negative north pole object particles pass pendulum piston plane plate platinum polarized pressure prime conductor principle produced pulley rays of light reflected refraction repelled revolve rise shown in Fig solid sound sound-wave south pole spark specific gravity steam stone substance sulphuric acid surface temperature theory tricity vacuum vapor velocity velocity of sound vessel vibrations waves weight wheel wind wire zinc
مقاطع مشهورة
الصفحة 52 - that every particle of matter in the universe attracts every other particle, with a force whose direction is that of the line joining the two, and whose magnitude is directly as the product of their masses, and inversely as the square of their distances from each other.
الصفحة 52 - Newton, who came to the conclusion that every particle of matter attracts every other particle with a force proportional to the product of their masses, and inversely proportional to the square of their distances.
الصفحة 23 - Hebrews was the length of the forearm from the elbow to the end of the middle finger; and the smaller scriptural dimensions are expressed in hand-breadths and spans.
الصفحة 14 - Thus a molecule of hydrogen is believed to be made up of two atoms of hydrogen ; while a molecule of water is made up of two atoms of hydrogen and one of oxygen.
الصفحة 93 - This proves that a body in water is buoyed up by a force equal to the weight of the water it displaces.
الصفحة 254 - To matter or to force The All is not confined ; Beside the law of things Is set the law of mind ; One speaks in rock and star, And one within the brain, In unison at times, And then apart again; And both in one have brought us hither That we may know our whence and whither.
الصفحة 117 - Archimedes' principle, that a body immersed in water is buoyed up by a force equal to the weight of the water displaced by the body.
الصفحة 254 - Tis only through the soul That aught we know is known : — With equal voice she tells Of what we touch and see Within these bounds of life, And of a life to be ; Proclaiming One who brought us hither, And holds the keys of whence and whither.
الصفحة 146 - Pythagoras, who lived in the 6th century before Christ, conceived that the celestial spheres are separated from each other by intervals corresponding with the relative lengths of strings arranged to produce harmonious tones. In his musical investigations he used a monochord, the original of the sonometer now employed by physicists, and wished that instrument to be engraved on his tomb. Pythagoras held that the musical intervals depend on mathematics ; while his great rival, Aristoxenes, claimed that...
الصفحة 121 - Scientific education ought to teach us to see the invisible as well as the visible in nature ; to picture with the eye of the mind those operations which entirely elude the eye of the body ; to look at the very atoms of matter in motion and at rest, and to follow them forth, without ever once losing sight of them, into the world of the senses, and see them there integrating themselves in natural phenomena.