Word: reach
(lookup in dictionary)
(lookup stats)
Dates: during 1960-1969
Sort By: most recent first
(reverse)
...suggested launching spacecraft by simply accelerating them with electrical power along a track. Unimpeded by atmospheric friction, the vehicles could accelerate very rapidly, limited only by the maximum gravity that their cargo could withstand. An unmanned craft designed to take a force of 50 G's, for example, could reach escape velocity on a track only four miles long. Manned ships, whose passengers could not be exposed to so high a G-force, would need a track considerably longer...
...there are more palpable treasures. Some scientists, assuming that the moon was created when the earth was, some 4.5 billion years ago, calculate that about 10 trillion tons of meteors have fallen on the lunar surface. From their analysis of the composition of the relatively few meteors that reach the earth's surface (most are burned up by the atmosphere), they estimate that meteors have deposited 450 billion tons of iron, 30 billion tons of nickel, 10 billion tons of phosphorous, 9 billion tons of carbon, 6 billion tons of copper and 3 billion tons of cobalt on or near...
...power turbines before being condensed into drinking water. When lunar water is finally available in ample supply, it could even be used for rocket fuel. Moon technicians will decompose it into hydrogen and oxygen gases by electrolysis, then feed the gases into a lunar cryostat, a device that can reach extremely low temperatures during the chill lunar night without using power. The resulting products would be liquid hydrogen and liquid oxygen, familiar space-age fuels...
...experiment conducted by Latane and another colleague, college students in a waiting room heard a tape recording that simulated the sounds of a woman climbing onto a chair to reach a stack of papers. She fell, injured her ankle, and began to moan, "Oh my God -my foot! I . . . can't get this thing off me." Seventy percent of the people who were waiting by themselves offered help; with another person in the waiting room, only 20% showed their concern...
...able to dominate much of the body: how a man walks, talks, or wiggles his fingers is controllable by reason and will. But the body's glandular and visceral processes-run with sovereign independence by what scientists call the autonomic nervous system-have long been considered beyond the reach of conscious control. The only exceptions, it was thought, were bizarre and inexplicable cases, such as the Indian yogis, who can regulate their heart beat and their breathing. Now, though, experimental psychologists have proved that the body's autonomic system can, in fact, be taught-although as yet they...