Word: exhaustive
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Dates: during 1940-1949
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...reach "escape velocity," the space ship's fuel must be used as economically as possible, and the efficiency of a rocket motor depends on the speed of the exhaust gases. Lewis calculated that a space ship carrying half its total weight in fuel would have to shoot out its exhaust gases at 9.95 miles a second...
Since the speed of the exhaust gases is proportionate to the temperature in the combustion chamber, Lewis next calculated what temperature such a rocket's materials would have to stand. The figure came out about 506,000° F., which is about 80 times more than enough to melt a combustion chamber made of any known substance...
Unfortunately some Harvard students are harder to please. Large numbers are hoping for Jeep exhaust pipes, a new carburetor, a metal top, or a radio for their cars. Other much-wanted items, which are more likely to be found, are sweaters, cigarette cases, cufflinks, tie clasps, scarves, socks, good books, and neckties...
...intercontinental bombers. The atom bomb would be dropped, but it is not the abso lute weapon it has been said to be. It is not even as devastating as popularly supposed, says Bush. The costs of manufacturing and of delivering it would be so vast that they might well exhaust a nation before it had struck a winning blow...
...help only 25%," says Dr. Rhoads, "and they have remissions only. Their disease will recur and recur, perhaps in more violent form. Some people ask, 'Why keep them alive, if they must die eventually?' But we're moving faster now. Perhaps, before they exhaust their last remission, we'll have something really good. And you've seen how happy they...