Word: frictions
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Dates: during 1930-1939
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...steel block, ground microscopically smooth on its upper and lower sides. Between the block surfaces and the cylinder faces are placed specks (one-tenth gram or less) of the stuff to be tested. Straight pressure is applied, squeezing out some of the stuff from under the pistons, until the friction of its flow becomes so great that no more escapes. Then, as the pressure is stepped up, the steel block is rotated by a man exerting his full strength at the end of a yard-long lever, equipped with a strain gauge to measure the twisting force. When the lever...
...There has been some criticism of smoking by Radcliffe students, particularly on the steps of Fogg Museum, Widener Library, and the Harvard Music Building. The members of the Dean's Advisory Committee wish to bring the matter to your attention in an effort to prevent friction and to maintain our relations with Harvard on a mutually pleasant basis...
...terrestrial attraction. It will grow to a giant disk covering one-twentieth of the sky, lighting the night with baleful splendor. The lunar mountains, four miles high, will crack and crumble. Earth will shudder, open tremendous crevasses. The rain of moon fragments, falling as meteorites heated by atmospheric friction, will make steaming cauldrons of the seas, a smoking ruin of the land. At 20,000 miles what remains of the moon will break in two. then into successively smaller pieces, some of which, falling into satellitic orbits, will form glowing rings around Earth like those around Saturn. By that time...
Professor Balck, "Friction and Efficiency", Jeff. Phys...
...residual salt is as flat as a concrete highway, so hard that iron tent-stakes often bend when driven in. In the winter two inches of rain cover the flats, leave a fresh, white, marble-smooth surface in the spring. There is no dust. Moisture in the salt cools friction-heated tires. The salt's resistance minimizes skidding. There are two concentric circular tracks at Bonneville, one twelve and a half miles around, the other ten. For Sir Malcolm a 13-mile straightaway was laid out near the Western Pacific Railroad tracks which cross the flats from east...