Word: sink
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...Geological Survey and Italian-born Dr. Cesare Emiliani, it depends on the fact that a tiny amount of uranium is dissolved in all sea water. When it slowly decays radioactively, it yields protoactinium 231 and thorium 230, both of which attach themselves to sediment particles and sink slowly to the bottom. There they in turn decay, but protoactinium 231 decays faster than thorium 230. The age of sediment on the ocean floor can therefore be determined by measuring the relative abundance of the two isotopes...
...examine the works in detail. French Archaeologist Jean Doresse, who has been to Aksum, claims that the Madonnas are watercolors painted on canvas by native artists in the tradition established during the flourishing period of the Portuguese influence in the 16th century. Because of the way that the watercolors sink into the cloth, the paintings have the texture of tapestry. Other authorities, however, claim that the Madonnas are indeed true tapestries, and that they were carried from Europe to this outpost of Christianity in Africa several hundred years...
...motor cars, turbines and typewriters, boilers and books. With less than 1/25th of the nation's 50 million people, hardworking Milan pays 26% of Italy's national tax bill. Sometimes the Milanese jokingly threaten to secede and join Switzerland. If they did, the remainder of Italy would sink in economic significance to the level of Greece or Portugal...
Flaming Arc. Thus, even while the heat-sink cones were still being tested, both G.E. and Avco started work on a new kind of cone. It was deliberately designed so that some of its material would be "ablated"-vaporized and blown away into nothingness by the intensely hot air through which it raced. Ablating cones promised a weight advantage, but not even the shock tube was adequate to test them at the research level. Therefore a new testing device, the arc wind tunnel, was tailored...
...ablating nose cone is the design of the present. It is longer and more pointed than its heat-sink predecessor. It can slice more deeply through the atmosphere before it slows down, giving it greater protection against defensive missiles fired from the ground. Better still, it is comparatively light: the G.E. ablating nose cone used on the "longfellow'' Atlas fired May 20 from Florida to the Indian Ocean probably played an important part in the missile's being light enough to attain its 9,000-mile range...