Word: emits
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Dates: during 1970-1979
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...fill the line behind the pig. The moving oil will push the pig through the 48-in.-diameter steel pipe at 1 m.p.h. As it goes, the cylinder will shove out of the pipe any refuse that may be contained (for example, tools left behind by forgetful workmen) and emit beeps indicating its location. Eight pumping stations will help the oil push the pig along, and walking inspection crews will escort the cylinder, monitoring its signals...
...certain products, including hair sprays. Fluorocarbons, for all their drawbacks, are not combustible; neither is the butane-water mix in the Aquasol system. Anticipating the federal fluorocarbon ban, Gillette and some other manufacturers last year began switching to pump-action containers for their products, but these do not emit the fine, even spray of Abplanalp's aerosol nozzles. If Aquasol passes market tests and proves as popular as aerosol, the nation's medicine cabinets could remain stocked with spray cans a long time into the future...
...exceed five million dollars. The telescope housing alone cost over $1.3 million. Herbert Gursky, the Center's associate director for optical and infrared astronomy, says researchers will use the new telescope to make a systematic survey of quasars--the most distant, fastest-moving objects in the universe. Quasars also emit radiation at vastly higher levels than any other objects, because of their distance from earth. Only a large telescope can detect them. Quasars may provide astronomers with a window on the early history of the universe because their light takes billions of years to reach the earth. Gursky says...
Because black holes emit no radiation, they can never be directly observed. Their existence may be deduced only from the extraordinary effects black holes have on nearby objects, outside the event horizon. Lightman is attempting to predict the influence of black holes upon the distribution of stars, anticipating the day when such stellar patterns can be observed...
...these dangers have turned out to be exaggerated. Most scientists now believe that it would take a fleet of at least 100 SSTs to produce even a minimal greenhousing effect; no more than 16 Concordes are likely to be manufactured. Future generations of SSTs will probably be designed to emit much less water vapor. As for pollution, the plane's emissions fall within generally accepted levels. The available evidence does not substantiate the fears of ozone destruction. Compared with the thousands of U.S., Soviet and West European supersonic warplanes that crisscross the skies, the tiny Concorde fleet could...