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absorbed alternating current ammonia amount battery body boiler boiling bulb burner calories carbon cent chamber circuit closed coal Coffee percolator coil color condensation conductor connected convection cooker cooled cubic cubic foot cylinder damper device diaphragm diffused disc distance dry cell efficiency electric current energy enters ether waves expansion Fahrenheit faucet feet filament flame flow foot-candle force freezing fuel furnace gas mantle gasoline gives glass gram heater hot water hot-water hydrometer inches Inlet insulation iron kerosene lamp length lens lever light liquid machine magnetic measure melt mercury metal meter object outlet oven passes pipe placed plate pounds pressure produced pump radiator rays rectilinear lens REFERENCE BOOKS reflected refrigerator resistance result space specific heat spring steam stove supply surface tank temperature thermometer thread tube tungsten vacuum valve vapor ventilation vibration walls warm weather weight wheel wire
Popular passages
Page 375 - The unit of weight is the GRAM, which is the weight of one cubic centimeter of pure water weighed in a vacuum at the temperature of 4 deg.
Page 373 - ... attract each other with a force that varies inversely as the square of the distance between them. Fact is concrete, and is a matter of physical experience: truth is abstract, and is a matter of mental theory.
Page 291 - Costs are based on the following prices: candles, 12 cents per pound; kerosene, 15 cents per gallon; gas, $1 per 1,000 cubic feet; electricity, 10 cents per kilowatt hour. The solid lines represent cost of fuel or of current, the shaded parts the cost of the mantles and bulbs. Where prices are different from those given above, costs will be correspondingly different.
Page 333 - If we use the English system, the unit of work is the foot, pound. This is the work done by a force of 1 pound acting through a space of 1 foot ; that is, it is the amount of work required to lift 1 pound to a height of 1 foot.
Page 352 - The efficiency of a machine is the ratio of the useful work done by it to the total work done by the acting force, a.
Page 8 - BTU, and this is the amount of heat that will raise the temperature of one pound of water 1 degree Fahrenheit.
Page 247 - When a ray of light passes from a rarer to a denser medium, it is bent toward a perpendicular drawn to the surface of the denser medium.
Page 243 - ... the angle of reflection is always equal to the angle of incidence, the image for any point can be seen only in the reflected ray prolonged.
Page 18 - A British thermal unit (BTU) is the quantity of heat required to raise one pound of water one degree Fahrenheit.
Page 196 - German-silver wire, has a resistance of about one ohm. The legal definition of the ohm is a resistance equal to that of a column of mercury 106.3 centimeters long and 1 square millimeter in cross section, at 0° (7.