Whitman-Peck Physics

airplane alternating current ammeter amperes angle anode armature automobile beam bimetal body called camera cathode cathode-ray tube charge circuit coil color condenser conductor connected cooling Courtesy current flow cylinder direct current direction distance dry cell earth elec electrical electrons electroscope energy engine film foot-candles frequency friction ft per second fuel galvanometer gases gasoline gear glass gravity heat iconoscope increase induced iron kinescope lamp lens light lines of force liquid machine magnetic field measure mercury metal meter miles mirror molecules motion motor move needle negative object Ohm's Law ohms particles pipe piston plane plate pole pressure principle produce pump push radio rays resistance result rotating shown in Fig Sidelight sound speed spring steam surface tank temperature tion transmitted tricity tube turn unit vacuum vacuum tube valve vapor velocity vertical vibration voltage volts warm wave length weight wheels wire