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What Makes It Tick?
Heating by Electricity
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absorbs heat actor air cooler air pressure airplane automobile balance wheel bombers bombs broadcast seeder bulb called camera carrier carry clock clouds coal coil cold air condenser cooled crankshaft cream crops cylinder deck depth charges dive dive bombers earth electric waves electron gun enemy engine escape lever farmer film fire flow fluorescent lamp furnace gasoline gears glass glider goes grain ground heavy hold hundred iconoscope inches inside internal-combustion engines keep kind kite light locomotive machine guns mercury metal miles an hour milk motor move photo-electric picture pilot pinhole camera pipe piston plane plants plate plow produced pump push radio rain refrigerator scene seeds ship shutter snow soil speed steam steam locomotive storm submarine tanks teeth telephone temperature thermometer things tiny torpedo tracks train tricity tube turn warm air weather whirling wind wings wires