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About Medford mail tribune. (Medford, Or.) 1909-1989 | View Entire Issue (Nov. 10, 1960)
MEDFOHD MAIL. TRIBUNE. MEDFOHD. OHt. THURSDAY, NOVEMBER 10. 1860 Scientists Seeking Answer To Collision Of Rock, Space Ship New York, N. Y. (Scientific American Feature) - What happens when a small rock speeding through space at the rale of 40 miles per second collides with a space ship ap proaching in the opposite di rection at the rate of 10 miles per second? ' . Scientists are now experi menting to learn the answer. Collisions of such violence do not occur between objects of appreciable size on earth. Bul lets, from even the highest powered rifles fail to attain a muzzle velocity of even one mile per second. A start on this fascinating aspect of space-age research has been made, nonthelcss, by A,; C. Charters and his col' leagues in the hyperveloeity ballistic range branch of the National Aeronautics and Space administration. "Our experiments, which as yet extend only a little past 20,000 feet per second, show that high-speed Impact differs sharply from the proc ess at lower speeds," Dr. Charters reports. "To study the phenomena of violent col lisions we have thus far sim ply fired projectiles into tur gets and observed the craters produced by the impact. At low velocities the projectiles were spheres of tungsten car bide; at high velocities, hard ball-bearing steel. The targets were massive djocks ui own. lead, aluminum, granite and copper. Speeds varied from a few hundred feet per second to 20,000. Deep. Narrow Cavity "At low speeds the projec tile penetrated a metal target intact and made a deep, nar row cavity like a nail hole. The penetration increased steadily with velocity; dou bling the velocity increased penetration by a factor of about 2.5. This relationship holds for a number of differ ent materials. A second fea ture of low-velocity impact is that the projectile retains They'll Do It Every Time By Jimmy Hatlo Tme was in OL' DOWNTOWM m HORSECHESTER WHEN YOU JUST COULDN'T PARK WITHIN 50 FEET OF AH INTER SECTION OR ANYTHING ELSE- But now the i CITY FATHERS ; HAVE INSTALLED 1 PARKING METERS SO IT'S STRICTLY SARDINEVILLE MV HOW THAT DOU6H DO ROLL N fHANXANOATIPOP THE ODE BACON, JORDAN STA.t f&fh. ONT..CANADA Q VM. Hint rluf,i Byni, its spherical shape as It forces its way into the target. ' "At some velocity, depend ing on the strength of t h e projectile and target, the pro jectile no longer withstands tile forces of Impact and starts to deform or, if it is brittle, to break Into pieces. In our experiment this transition zone appeared at the approxi mate velocity of 1,500 feet per second. As the velocity is increased beyond the critical 4-H HEWS The Lake Creek General 4-H club held its first meet ing at the Lake Creek Grange hall Nov. 4, with 18 members attending. Officers elected were presi dent, Mark Flint; vice presi dent, Victor Halsel; secretary, Alice Woolfolk, song leader, Mary Ann Gardner; reporter, Tom Perry, and treasurer, Ra pheal Gardner. Leaders for' the individual clubs are Robert Fisher, beef and sheep; Ed Peile, hog; Larry Perry, horse; Jody Walch, camp cookery, and Alice Woolfolk, junior leader. The next meeting will be in February at the Lake Creek Grange hall. The beef, hog and sheep clubs will meet Dec. 2 at the Robert Fisher home, and the horse club will met Dec. 9 at the Garth Flint home. Refreshments were served by the club leaders. Tom Perry, Roporter CAN CLATTER CALMED Heanor, England -(DPI)-. Ten ants here are being supplied with rubber garbage can lid-, so that miners on the night shift can get some sleep. S vS5n This is the "Yeast tha!t goes into the Rolls hatftaste the best Buy 'em at your bakers, or bake 'em at home, the best rolls are made with Fleischmann's Yeast. With Fleischmann's in the dough, breads and rolls rise high and handsome every time. That's why prize-winning cooks from Portland to Pensacola use Fleischmann's Yeast. If you bake at home, buy Fleischmann's at your store todayin the "Thrifty Three" strip . . . and get an extra strip to keep handy in the cupboard. Fleischmann's Active Dry Yeast stays fresh for months. ANOTHER FINK PRODUCT Or STANDARD BRANDS INCORPORATED point, a ductile projectile mushrooms in front as though' it were trying to turn itseli Inside out. The rate at which the penetration Increases with velocity begins to fall off. A, crater is formed in the target material that widens with projectile velocity and Begins' to approach a hemispherical shape. Virtually No Strength "Eventually, at about 8,000 feet per second In our experi ments, the shape of the crater becomes almost precisely hem ispherical. At still higher speeds the penetrating power of the projectile again increas es with velocity at a constant rate, but now, when the ve locity is doubled, the factor of Increased penetration is only I.e. Clearly another tran sition zone has been crossed. "At the highest velocity we have attained (when the pres sure in the ball at the start of the collision is greater than 15,000 tons per square inch) the ' materials behave ai though they had virtually no strength at all. Thus one might expect the projectile and target to flow under the stresses of. impact as though they were fluids. wThis is in fact what the experiments seem to show, and the new re gion has been named the flu id impact region. Judging from these experiments, a me teoroid of average speed weighing even a few hundred millionths of an ounce could easily pierce a metal skin thick enough to contain air at normal pressure for space travellers. How the results of the experiments should be ap plied is still a matter of guesswork." PROCESS DEFINED Toledo Benefication is any process by which the yield of metal from ore is increased. COFFIN NEEDS Peiplng Wood for coffins provides one of the heaviest drains on Chinese forests. SUBMARINE LOSS Washington The German navy lost 78 of its U-boats during World War II. eunnysofe up oroereasy KJ'iLD'D for better breakfasts! Enjoy the National Guard-American Legion dance tonight. Have a nice breakfast with the VFW tomorrow, have fun during the day's festivities, drive carefully and SAVE MONEY with these fine buys! Plan A Day Of Thrifty Nourishing Eating With these Specials Pork Chops A9 Ground ChuckS ""-,,59' BONELESS Beef Stew Meat.-". . 69 U.S. Choice and Good Sirloin Steak Semi-Boneless, lb. 79' T Bone Steaks 98 Cube Steak 9& IS- I wi!,l.Tjiil!S.tJlllt -'' Swansdown CAKE Lean jjggj. Fresh 1 $1 Jm SORAN'S EXm Eft a pc (FtTRtrl lbs. 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