Word: vapor
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Dates: during 1970-1979
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...poured at-259°F. A tank pressure of 70 lbs. per square inch forces the liquid into a combination pressure regulator and heat exchanger. The heated gas is then mixed with air in the carburetor and flows into the cylinders, where it burns more completely than ordinary gasoline vapor...
...minutes after the somber procession began, however, the angry mountain responded with another explosion of hot vapor and clouds of sand. To those at the scene the outburst sounded like the beginning of the Apocalypse...
...been known since 1839. Pratt & Whitney also designed the fuel cells used in Apollo flights. But the specific and well-financed proposal to employ them en masse is new. For environmentalists, Powercel would deliver power with a plus: the only waste products of its chemical reaction are harmless water vapor, carbon dioxide, and a little heat. Its on-site use would eliminate unsightly power lines as well as the complex network of power plants, substations and generators...
...galaxy or quasar. Smog adds to the astronomer's headache; by scattering ground light in all directions, tiny smog particles can greatly increase the glare over an observatory. Not only the amount, but also the character of the light can affect a telescope's usefulness. Increasingly, mercury-vapor street lamps are the astronomer's special bane. They happen to be a powerful source of ultraviolet radiation, which is in the part of the light spectrum that gives astronomers important clues to the nature of certain stars and galaxies. And if a city's street lamps...
...other major astronomy center, Tucson, Ariz., but astronomers there are already worrying about the glowing threat. The area's five major observatories-including Kitt Peak, which expects to unveil a 150-in. telescope next year-recently petitioned the town fathers to shield and filter all mercury-vapor street lamps, ban all but essential searchlights, and pave roads with blacktop instead of lighter, reflective concrete. Aware of the observatories' contributions to the local economy, the Tucson councilmen agreed to consider the requests...