Word: celsius
(lookup in dictionary)
(lookup stats)
Dates: during 1970-1979
Sort By: most recent first
(reverse)
...antenna was of far greater significance: its temperature was remarkably close to what scientists had been predicting for radiation left over from the primordial fireball. In theory, this radiation should be equivalent to what would be emitted by a so-called black body with a temperature of only 3.5 Celsius degrees above absolute zero-or about what the temperature of the universe should be now, billions of years after the fireball. The Bell scientists' discovery virtually confirmed that the universe had begun with a bang and, as the Royal Swedish Academy of Sciences put it, "has made it possible...
Tiny Bombs. Still, to join enough deuterium and tritium nuclei to sustain a fusion reaction requires heroic efforts. Deuterium-tritium gas mixtures must be heated to as much as 100 million degrees Celsius and be maintained at that temperature for about one second at a density of about 1014 (100 trillion) particles per cubic centimeter. Scientists have taken two different routes in their efforts to achieve these critical conditions. One is to use a "magnetic bottle" -an enclosing magnetic field-to contain the hydrogen fuel. The other is to use lasers or electron beams to make miniature hydrogen "bombs...
...Princeton University Plasma Physics Laboratory, scientists regularly heat the plasma in the Princeton Large Torus until it glows like an ectoplasmic bagel and have just achieved a density of 1014 particles per cubic centimeter, a confinement time of .10 second and a temperature of 35 million degrees Celsius...
...record plasma temperature-130 million degrees Celsius-has been attained at the University of California's Lawrence Livermore Laboratory with another variety of magnetic machine: the 2XII-B, which consists of an open-ended tube surrounded by magnets. Extra-powerful magnetic fields at the ends of the tube act as "mirrors," reflecting particles toward the center of the device and reducing leakage. But none of these or other exotic magnetic devices have yet simultaneously produced all three conditions necessary for controlled fusion...
KOBUK VALLEY. Fifty-six kilometers (35 miles) north of the Arctic Circle, the Kobuk Valley presents another topographical surprise-a stretch of glacier-formed sand dunes, some as high as 30 meters (100 ft.), where summer temperatures can soar to more than 38° Celsius (100°F.). The desert-like dunes are more than 33,000 years old; pre-Eskimo archaeological sites along Onion Portage, which cuts through them, are estimated to be 10,000 years old and are considered among the most important in the Arctic...