Word: tunnelling
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Dates: during 1960-1969
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...Operation Mallet, hammering at a tunnel-and-village complex a scant 15 miles southeast of Saigon. The Thors: some 2,000 men with tanks and artillery of the U.S. 1st Infantry Division...
Verne's underground hike would, have taken far less time, says Cooper, if he had simply fallen into a frictionless tunnel bored through the earth's center. Accelerated by the force of gravity on the first half of his trip, he would have gained just enough kinetic energy to coast up to the other side-against the pull of gravity-in a total time of only 42.2 minutes...
Universal Timetable. Fascinated by his initial calculation, Cooper worked out a formula for the time required for an object to fall through a straight-line tunnel bored between any two points on the surface of the earth. Surprisingly, no matter how close or far apart the two points were, the time turned out to be constant: 42.2 minutes...
Gravity-Powered Travel. To be sure, some formidable obstacles would have to be overcome before his scheme could become reality. At its midpoint, a Washington-Boston tunnel would be five miles below the surface of the eartha technically difficult and prohibitively costly bit of construction. In addition., the subterranean temperature at a five-mile depth might be as high as 265° F., and a passenger vehicle would need an immense cooling system. Finally, because a perfect vacuum could not be created within the tunnel, and because the vehicle would probably have to ride on some sort of rail, friction...
With pick and shovel, the boy from Gourtloughera helped dig the city's last big subway tunnel. When he worked in a subway change booth-an 84-hour week for a $27.72 pay envelope-the need for a union was obvious. With six others, he started the T.W.U. in 1934 and became its first president. "We were dealing with a lot of young Irishmen who came over from secret organizations," he said. "They liked the secrecy and the intrigue. I liked it too. It never left...