Word: frictions
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Dates: during 1930-1939
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...much stronger tire by using rayon (TIME, Aug. 15), the makers of cotton tire cord were stirred to action. Last week the biggest one of all, Bibb Manufacturing Co. of Macon, Ga., announced the result-a cotton tire cord which it claims has 25% more tensile strength under friction heat developed at high speeds than the old cotton type. A Bibb customer simultaneously announced that tests of the new cord had shown it would last 317 hours under intense heat, while rayon cord failed at 143 hours, ordinary cotton at 87 hours...
...they remembered the turn-of-the-Century astonishment when Henry Ford's 999 traveled at the incredible speed of a mile a minute. Scientists agreed that the Englishmen could not travel much faster and live to tell about it (present rubber tires can take just so much friction). King-for-a-day Cobb, who had originally intended to continue the contest as long as weather permitted, blinked his eyes, decided to call it quits for this year...
...Because the marble-smooth salt in the early morning is marble cold, cools friction-heated tires, lessens a driver's greatest fear: blowouts. Meteorologists also claim that a greater speed can be attained in the rare air of Bonneville (4,300 feet above sea level). A speed of 345 m.p.h. at Bonneville would be only 293 m.p.h. at sea level...
...currents of air are generated. Theoretically these currents cut across the more stable air tongues, dividing each air tongue into three parts or "cells" - a centre cell in which the circulation is counterclockwise, between two cells in which the circulation is clockwise - like three gear wheels revolving in series. Friction tends to develop kinetic energy, ultimately generating strong winds in the centre cell of each air tongue. The two outer cells tend to disperse this energy north and south. The effects of this dispersion reach the ground, and ground friction furthers the action of the brakes...
...determined by the speed of the earth's rotation on its axis. Slower speed means a longer day. According to astronomers, speed of the earth's rotation on its axis is affected by the moon. Reason: the moon pulls the tides, and a strong pull creates friction on the earth's surface, slows down its motion. This well-known fact, said Professor Brown, accounts for slight variations in the day's length, but the moon's influence is not powerful enough to cause such large changes in time as that which occurred in 1897, when...